1. Chain-Growth Sulfur(VI) Fluoride Exchange Polycondensation: Molecular Weight Control and Synthesis of Degradable Polysulfates. Kim, H.; Zhao J, Bae J, Klivansky LM, Dailing EA, Liu Y, Cappiello JR, Sharpless KB, Wu P. ACS Cent Sci. 2021, Nov 24. 7(11):1919-1928.
  2. Modulation of Siglec-7 Signaling via in situ Created High-affinity cis-Ligands. Hong, S.; Yu, C.; Shi, Y.; Wang, P.; Chapla, D.G.; Rodrigues, E.; Moremen, K.W.; Paulson, J.C.; Macauley, M.S.; Wu, P. bioRxiv 2020, July 15.
  3. SuFExable Polymers with Helical Structures Derived from Thionyl Tetrafluoride (SOF4). Li, S.; Li, G.; Gao, B.; Pujari, S. P.; Chen, X.; Kim, H.; Zhou, F.; Klivansky, L. M.; Liu, Y.; Driss, H.; Impey, R. E.; Soares da Costa, T. P.; Lu, J.; Wu, P.; Zuilhof, H.; Moses, J. E.; Sharpless, K. B. Nat. Chem. In press, doi: 10.26434/chemrxiv.10005758.v1.
  4. Click Chemistry Expedited Radiosynthesis: Sulfur [18F]fluoride Exchange of Aryl Fluorosulfates.Zheng, Q.; Xu, H.; Wang, H.; Du, W.; Wang, N.; Xiong, H.; Gu, Y.; Noodleman, L.; Yang, G.; Sharpless, K. B.; Wu, P. Chemrxiv, 2019, Nov 15.                    doi: 110.1021/jacs.0c09306.
  5. Glycoengineering of NK cells with Glycan Ligands of CD22 and Selectins for B-cell Lymphoma Therapy.  Hong, S.; Yu, C.; Wang, P.; Shi, Y.; Cheng, B.; Chen, M.; Chapla, D.G..; Reigh, N.; Narimatsu, Y.; Chen, X.; Clausen, H.; Moremen, K.W.; Macauley, M.S.; Paulson, J.C.; Wu, P. Angew. Chem. Int. Ed. 2021, 60, 3603.
  6. Detecting Tumor Antigen-specific T cells via Interaction Dependent Fucosyl-biotinylation. Liu, Z.; Li, J.P.; Chen, M.; Wu, M.; Shi, Y.; Li, W.; Teijaro, J.R.; Wu, P. Cell, 2020, 183, 1117.
  7. hFUT1-based Live Cell Assay to Profile α1-2-fucosides enhanced Influenza A Virus Infection. Hong, S.; Grandy, G.; Yu, C.; Chapla, D. G.; Reigh, N.; Yang, Y.; Izumori, K.; Moremen, K. W.; Xie, J.; Wu, P. ACS Chem. Biol. 2020, 15, 819.
  8. In Situ Fucosylation of the Wnt Co-receptor LRP6 Increases Its Endocytosis and Reduces Wnt/β-Catenin Signaling Hong, S.; Feng, L.; Jiang, H.; Hou, X.; Guo, P.; Marlow, F. L.; Stanley, P.; Wu, P. Cell. Chem. Biol. 2020, 27, 1140.
  9. Direct Visualization of Live Zebrafish Glycan via Single-step Metabolic Labeling with Fluorophore-tagged Nucleotide Sugars. Hong, S.; Sahai-Hernandez, P.; Chapla, D.G.; Moremen, K.W.; Traver, D.; Wu, P. Angew. Chem. Int. Ed. 2019, 58, 14327.
  10. Biocompatible SuFEx Click Chemistry: Thionyl Tetrafluoride (SOF4)-Derived Connective Hubs for Bioconjugation to DNA and Proteins. Liu. F.; Wang, H.; Li, S.; Bare, GAL.; Chen, X.; Wang, C.; Moses, J.E.; Wu, P.; Sharpless, K.B. Angew. Chem. Int. Ed. 2019, 58, 8029.
  11. Stage-Specific and Selective Delivery of Caged Azidosugars into the Intracellular Parasite Toxoplasma gondii by Using an Esterase-Ester Pair Technique. Tomita, T.; Wang, H.; Wu, P.; Weiss, L.M. mSphere. 2019, 4, pii: e00142-19.Bacterial Glycosyltransferase-mediated Cell-surface Chemoenzymatic Glycan Modification. Hong, S.; Shi, Y.; Wu, N. C.; Grande, G.; Douthit, L.; Wang, H.; Zhou, W.; Sharpless, K. B.; Wilson, I. A.; Xie, J.; Wu, P. Nat. Commun. 2019, 10, 1799.
  12. Bacterial Glycosyltransferase-mediated Cell-surface Chemoenzymatic Glycan Modification. Hong, S.; Shi, Y.; Wu, N. C.; Grande, G.; Douthit, L.; Wang, H.; Zhou, W.; Sharpless, K. B.; Wilson, I. A.; Xie, J.; Wu, P. Nat. Commun. 2019, 10, 1799.
  13. Novel Approaches to AccessArylfluorosulfates and SulfamoylFluorides Based on Sulfur (VI) FluorideExchange. Liu, Z.; Meng, G.; Guo, T.; Dong, J.; Wu, P. Curr. Protoc. Chem. Bio. 2019, e64, doi: 10.1002/cpch.64.
  14. Cryo-EM structure of L-fucokinase/GDP-fucose pyrophosphorylase (FKP) in Bacgteroides fragilis.  Liu, Y., Hu, H., Wang, J., Zhou, Q., Wu, P., Yan, N., Wang, H.W., Wu, J.W., Sun, L. Protein Cell. 2018, Sep 21. doi: 10.1007/s13238-018-0576-x.
  15. Single-step chemoenzymatic reaction for the construction of antibody-cell conjugate. Li, J., Chen, M., Liu, Z., Zhang, L., Felding, B., Moremen, K.W., Lauvau, G., Abadier, M., Wu, P. ACS Cent Sci. 2018, 12, 1633.
  16. Antibody selection using clonal cocultivation of Escherichia coli and eukaryotic cells in miniecosystems.  Zheng, T., Xie, J., Yang, Z., Tao, P., Shi, B., Douthit, L., Wu, P., Lerner, R.A. Proc. Natl. Acad. Sci. 2018, Jul 3;115(27):E6145-E6151. doi: 10.1073/pnas.1806718115. Epub 2018 Jun 18.
  17. Sialyltransferase-Based Chemoenzymatic Histology for the Detection of N- and O-Glycans.  Lopez Aguilar, A., Meng, L., Hou, X., Li, W., Moremen, K.W., Wu, P. Bioconjug Chem. 2018, 29, 1231.
  18. Cell-Based Glycan Arrays for Probing Glycan–Glycan Binding Protein Interactions. Briard, J.G., Jiang, H., Moremen, K.W., Macauley, M.S., Wu, P. Nat. Commun. 2018, 9, 880.
  19. SuFEx Click Chemistry Enabled Late-Stage Drug Functionalization. Liu, Z.; Li, J.; Li, S.; Sharpless, K. B.; Wu, P. J. Am. Chem. Soc. 2018, 140, 2919.
  20. Engineered glycocalyx regulates stem cell proliferation in murine crypt organoids. Rouhanifard, S.H.; Aguilar Lopez, A.; Meng, L.; Moremen, K.W.; Wu, P. Cell. Chem. Bio. 2018, 25, 439.
  21. Modulating cell-surface receptor signaling and ion channel functions by in situ glycan editing. Jiang, H.; Meng, L.; Lopez-Aguilar, A.; Gao, Z.; Liu, Y.; Tian, X.; Yu, G.; Ovryn, B.; Moremen, K.W.; Wu P. Angew. Chem. Int. Ed. 2018, 57, 967.
  22. Inhibition of Delta-induced Notch Signaling Using Fucose Analogs. Schneider, M.; Kumar, V.; Nordstrøm, L.; Feng, L.; Takeuchi, H.; Stanley, P.; Wu, P.*; Haltiwanger, R. S.* Nat. Chem. Biol. 2018, 14, 65, (*co-corresponding authors).
  23. Profiling of Protein in O-GlcNAcylation in Murine CD8+ Effector- and Memory-like T cells. Aguilar Lopez, A., Gao, Y., Hou, X., Lauvau, G., Yates, J.R., Wu. P. ACS Chem. Biol. 2017, 12, 3031.
  24. A Chemoenzymatic Histology Method for O-GlcNAc Detection. Lopez Aguilar, A.; Hou, X.; Wen, L.; Wang, P.G.; Wu, P. Chembiochem. 2017, 18, 2416.
  25. Visualizing Glycans on Single Cells and Tissues. Ovryn, B.; Hong, S.; Li, J.; Wu, P. Curr. Opin. Chem. Biol. 2017, 39, 39.
  26. Bifluroide-catalysed sulfur(VI) fluoride exchange reaction for the synthesis of polysulfates and polysulfonates. Gao, B.; Zhang, L.; Zheng, Q.; Zhou, F.; Klivansky, L.M.; Lu, J.; Liu, Y,.; Dong, J.; Wu, P.; Sharpless, K.B. Nat Chem. 2017, 11, 1083, (*co-corresponding authors).
  27. A chemoenzymatic histology method for O-GlcNAc detection. Lopez, A.A.; Hou, X.; Wen, L.; Wang, P.G.; and Wu, P.  Chembiochem. 2017, 18, 2416.
  28. Fabrication of Photocontrolled Surfaces for Oil/Water Separation through Sulfur(VI) Fluoride Exchange. Zhu, H.; Chen, D.; Li, N.; Xu, Q.; Li, H.; He, J.; Wang, H.; Wu, P.; Lu, J. Chem. Eur. J. 2017, 23, 14712.
  29. SuFEx-Based Polysulfonate Formation from Ethenesulfonyl Fluoride-Amine Adducts. Wang, H.;† Zhou, F.;† Ren, G.; Zheng, Q.; Chen, H.; Gao, B.; Klivansky, L.; Liu, Y.; Wu, B.; Xu, Q.; Lu, J.; Sharpless, K.B.; Wu, P.* Angew. Chem. Int. Ed. Engl. 2017, 56, 11203.
  30. An in vitro tag-and-modigy protein sample generation method for single-molecule fluorescence resonance engry transfer. Hamadani, K.M.; Howe J.; Jensen M.K.; Wu P.; Cate J.H.D.; Marqusee S.  J Biol Chem. 2017, 292, 15636.
  31. Visualizing Glycans on single cells and tissues. Ovryn, B.; Hong, S.; Li, J.; Wu, P. Curr. Opin. Chem. Biol. 2017, 39, 39. 
  32. Palladium-Catalyzed Fluorosulfonylvinylation of Organic lodides. Zha, G.F.; Zheng, Q.; Leng, J.; Wu, P.; Qin, H.L.; Sharpless, K.B. Angew. Chem. Int. Ed. Engl. 2017, 56, 4849.
  33. Tools for Studying Glycans: Recent Advances in Chemoenzymatic Glycan Labeling. Lopez Aguilar, A.; Briard, J.G.; Yang, L.; Ovryn, B.; Macauley, M.S.; Wu, P. ACS Chem Biol. 2017, 12, 611.
  34. Multidimensional SuFEx Click Chemistry: Sequential Sulfur(VI) Fluoride Exchange Connections of Diverse Modules Launched From An SOF4 Hub. Li, S.; Wu, P.; Moses, J.E.; Sharpless, K.B. Angew. Chem. Int. Ed. Engl. 2017, 56, 2903.
  35. A Heck-Matsuda Process for the Synthesis of β-Arylethenesulfonyl Fluorides: Selectively Addressable Bis-electrophiles for SuFEx Click Chemistry. Qin, H.L.; Zheng, Q.; Bare, G.A.; Wu,P.*; Sharpless, K.B.*. (*co-corresponding authors) Angew Chem Int Ed Engl. 2016, Oct 10. doi: 10.1002/anie.201608807.
  36. Controlling Sulfuryl-Transfer Biology. Cook, I.; Wang, T.; Wang, W.; Kopp, F.; Wu, P.; Leyh, T. Cell Chem. Biol. 2016, 23, 579.
  37. Synthesis of Sulfotyrosine-Containing Peptides by Incorporating Fluorosulfated Tyrosine Using an FMOC Solid-phase Strategy. Chen, W.; Dong, J.; Li, S.; Liu, Y.; Wang, Y.; Poon, L.; Wu, P.; Sharpless, K.B.; Kelly, J.W. Angew. Chem. Int. Ed. 2016, 55, 1835.
  38. Chemoselective Synthesis of Polysubstituted Pyridines from Heteroaryl Fluorosulfates. Zhang, E.; Tang, J.; Li, S.; Wu, P.; Moses, J.E.; Sharpless, K.B. Chem. Eur. J. 2016, 22, 5692.
  39. Discovery of Autophagy Inhibitors with Anti-proliferative Activity in Lung and Pancreatic Cancer Cells. Nordstrøm, L.; Sironi, J.; Aranda, E.; Maisonet, J.; Perez-Soler, R.; Wu, P.; Schwartz, E. ACS Med. Chem. Lett., 2015, 6, 134.
  40. Tracking Surface Glycans on Live Cancer Cells with Single Molecule Sensitivity. Jiang, H.; English, B.; Hazan, R.; Wu, P.*; Ovryn, B*. Angew. Chem. Int. Ed, 2015, 54, 1765. (*co-corresponding authors). Highlighted in C&EN News: “Single Glycoproteins Caught In Motion” 2015, 93 (1), 21.
  41. CHoMP: A Chemoenzymatic Histology Method for Glycan Detection Using ‘Clickable’ Probes. Rouhanifard, S. H.; López-Aguilar, A.; Wu, P. ChemBioChem. 2014, 15, 2667.
  42. Negative Feedback Regulator of Wnt Signaling via N-linked Fucosylation in Zebrafish. Feng, L.; Jiang, H.; Wu, P.*, Marlow, F.L.* Dev. Biol. 2014, 395, 268. (*co-corresponding authors).
  43. Biocompatible Click Chemistry Enabled Labeling of Cytosolic Proteins and Compartment-specific pH Indicators. Yang, M.; Jalloh, A.; Wei, W. Zhao, J.*; Wu. P*; Chen, P.R.* Nature Comm. 2014, 5, Article number: 4981; doi:10.1038/ncomms5981 (*co- corresponding authors). Highlighted in C&EN News: “Ligands Let Copper Click Inside Cells” 2014, 92 (39), 30.
  44. Monitoring Dynamic Glycosylation in Vivo Using Super-sensitive Click Chemistry. Jiang, H.; Zheng, T.; Lopez-Aguilar, A.; Feng, L.; Kopp, F.; Marlow, FL.; Wu, P. Bioconjugate Chem. 2014, 25, 698.
  45. In vivo chemistry. Bertozzi, C. R.; Wu, P. Curr. Opin. Chem, Biol. 2013, 17, 717.
  46. Single-stranded DNA as a Cleavable Linker for Bioorthogonal Click Chemistry-based Proteomics. Zheng, T.; Jiang, H.; Wu, P. Bioconjugate Chem. 2013, 24, 859.
  47. Chemical Probing of Glycans in Cells and Organisms. Rouhanifard, S. H.; Nordstrom, L. U.; Zheng, T.; Wu, P. Chem. Soc. Rev. 2013, 42, 4284.
  48. Detection and Isolation of Dendritic Cells Using Lewis X-functionalized Magnetic Nanoparticles.
    Rouhanifard, S. H.; Xie, R.; Zhang, G.; Sun, X.; Chen, X.; Wu, P. Biomacromolecules. 2012, 13, 3039.
  49. Click Triazoles for Bioconjugation. Zheng, T.; Rouhanifard S.H.; Jalloh A. S.; Wu P. Top. Heterocycl. Chem. 2012, 28,163.
  50. Metabolomic Analysis of Patient Plasma Yields Evidence of Plant-Like α-Linolenic Acid Metabolism in Plasmodium falciparum Lakshmanan, V.; Rhee, K. Y.; Wang, W.; Yu, Y.; Khafizov, K.; Fiser, A.; Wu, P.; Ndir, O.; Mboup, S.; Ndiaye, D.; Daily, J. P. J. Infect. Dis. 2012, 206, 238.
  51. Imaging the Glycome in Live Cells. Li, B.; Mock, F.; Wu, P. Meth. Enzymol. 2012, 505, 401.
  52. Sulfated ligands for the Copper(I)-catalyzed Azide-Alkyne Cycloaddition. Wang, W.; Hong, S.; Tran, A.; Jiang, H.; Triano, R.; Liu, Y. Chen, X.; Wu, P. Chem. Asian J. The “Click Chemistry 10 Years” Special Issue. 2011, 10, 2796.
  53. Metabolic Labeling of Fucosylated Glycoproteins in Bacteroides. Webler-Besanceney, C.; Jiang, H.; Wang, W.; Baughn, A.; Wu, P. Bioorg. Med. Chem. Lett. The special issue in honor of Prof. Carolyn Bertozzi on the occasion of her receiving Tetrahedron Young Investigator Award. 2011, 21, 4989.
  54. Imaging Glycans in Zebrafish Embryos by Metabolic Labeling and Bioorthogonal Click Chemistry. Jiang, H.; Feng, L.; Soriano del Amo, D.; Seidel, R.D. III; Marlow, F. Wu, P. J. Vis Exp. 2011, DOI: 10.3791/2686
  55. Increasing the Efficacy of Bioorthogonal Click Reactions for Bioconjugation: A Comparative Study
    Besanceney, C.; Jiang, H.; Zheng, T.; Feng, Lei; Soriano Del Amo, D.; Klivansky, L.; Liu, Y.; Marlow, F.; Wu, P. Angew. Chem. Int. Ed. 2011, 50, 8051.
  56. Metabolic Labeling of Fucosylated Glycans in Developing Zebrafish. Dehnert, K. W.; Beahm, B. J.; Huynh, T. T.; Baskin, J. M.; Laughlin, S. T.; Wang, W.; Peng Wu, P.; Amacher, S. L.; Bertozzi, C. R.
    ACS Chem. Bio. 2011, 6, 547.LacNAc-Angew
  57. Tracking N-acetyllactosamine on Cell Surface Glycans in Vivo. Zheng, T.; Jiang, H.; Gros, M., Soriano del Amo, D.; Sundaram, S.; Lauvau, G.; Marlow, F.; Liu, Y., Stanley, P.; Wu, P. Angew. Chem. Int. Ed. 2011, 50, 4113.Fucosylation-JACS
  58. Biocompatible copper(I) catalysts for in vivo imaging of glycans. Soriano del Amo, D.; Wang, W.; Jiang, H.; Besanseney, C.; Yan, A, C.; Levy, M.; Liu, Y.; Marlow, F. Wu, P. J. Am. Chem. Soc. 2010, 132, 16893. Highlighted in C&EN News: “Imaging Molecules On Living Cells” 2010, 88 (48), 37.
  59. Chemoenzymatic synthesis of the sialyl Lewis X glycan and its derivatives. Soriano Del Amo, D.; Wang, W.; Besanceney, C.; Zheng, T; He, Y.; Gerwe, B.;Seidel, RD III, Wu, P. Carbohydr. Res. 2010, 345, 1107.
  60. Targeted metabolic labeling of yeast N-glycans with unnatural sugars. Breidenbach, M. A.; Gallagher, J. E. G.; King, D. S.; Smart, B. P.; Wu, P.; Bertozzi, C. R. Proc. Natl. Acad. Sci. U.S.A. 2010, 107, 3988.
  61. Rapid and selective detection of fatty acylated proteins using omega-alkynyl-fatty acids and click chemistry. Yap, M. C.; Kostiuk, M. A.; Martin, D. D.; Perinpanayagam, M. A.; Hak, P. C.; Siddam, A.; Majjigapu, J. R.; Rajaiah, G.; Keller, B. O.; Prescher, J. A.; Wu, P.; Bertozzi, C. R.; Falck, J. R.; Berthiaume, L. G. J. Lipid Res. 2010.
  62. Chemoenzymatic Synthesis of GDP-L-fucose and the Lewis X Glycan Derivatives. Wang, W.; Hu, T.; Frantom, P. A.; Zheng, T; Gerwe, B.; Soriano del Amo, D.; Seidel, R.D. III; Wu, P. Proc. Natl. Acad. Sci. 2009, 106, 16096.
  63. Metabolic Labeling of Sialic Acids in Living Animals with Alkynyl Sugars. Chang, P.; Chen, X.; Smyrniotis, C.; Hu, T.; Bertozzi, C. R.; Wu, P. Angew. Chem. Int. Ed. 2009, 48, 4030.
  64. Glycopeptide preferring polypeptide- GalNAc transferase-10 (ppGalNAc T10), involved in mucin type-O-glycosylation, has a unique GalNAc-O-Ser/Thr binding site in its catalytic domain not found in ppGalNAc T1 or T2. Perrine, C. L.; Ganguli, A.; Wu, P.; Bertozzi, C. R.; Fritz, T.A.; Raman, J.; Tabak, L. A.; Gerken, T. A. J. Biol. Chem. 2009, 284, 20387.
  65. Site-specific Chemical Modification of Recombinant Proteins Produced in Mammalian Cells Using the Genetically Encoded Aldehyde Tag. Wu, P.; Shui, W.; Carlson, B.; Hu, N.; Rabuka, D.; Lee, J.; Bertozzi, C. R. Proc. Natl. Acad. Sci. 2009, 106, 3000.
  66. Boron Nitride Nanotubes Are Noncytotoxic and Can Be Functionalized for Interaction with Proteins and Cells. Chen, X. ; Wu, P.; Rousseas, M.; Okawa, D.; Gartner, Z.; Zettl, A; Bertozzi, C. R. J. Am. Chem. Soc. 2009, 131, 890.
  67. Biocompatible Carbon Nanotubes Generated by Functionalization with Glycodendrimers. Wu, P.; Chen, X. ; Hu, N.; Tam. U. C.; Blixt, O.; Zettl, A.; Bertozzi, C. R. Angew. Chem. Int. Ed. 2008, 47, 5022.
  68. Role of architecture and molecular weight in the formation of tailor-made ultrathin multilayers using dendritic macromolecules and click chemistry. Vestberg, R.; Malkoch, M. Kade, M.; Wu, P.; Fokin, V. V.; Sharpless, K. B.; Drockenmuller, E; Hawker, C. J. J. Polym. Sci., Part A: Polym. Chem. 2007, 45, 2835.
  69. Catalytic Dipolar Cycloaddition of Azides and Alkynes: Reactivity and Applications. Wu, P.; Fokin, V. V. Aldrich. Acta. 2007, 40, 7.
  70. Osmium Catalyzed Olefin Dihydroxylation and Amino Hydroxylation with Second-Cycle Ligand. Wu, P.; Hilgraf, R.; Fokin, V. V. Adv. Synth. Catal. 2006, 348, 1079.
  71. Aziridines and Epoxides in Click Chemistry. Fokin, V. V.; Wu, P. in Aziridines and Epoxides in Organic Synthesis, Yudin, A. K. Ed., Wiley-VCH, New York, 2006, 443.
  72. Multivalent, Bifunctional Dendrimers Prepared by Click Chemistry. Wu, P.; Malkoch, M.; Hunt, J. N.; Vestberg, R.; Kaltgrad, E.; Finn, M. G.; Fokin, V. V.; Sharpless, K. B.; Hawker, C. J. Chem. Comm. 2005, 5775.
  73. Just Click It: Undergraduate Procedures for the Copper(I)-Catalyzed Formation of 1,2,3-Triazoles from Azides and Terminal Acetylenes. Sharpless, W. D.; Wu, P.; Hansen, T.; Lindberg, J. G. J. Chem. Educ. 2005, 82, 1833.
  74. One Pot Copper(I)-Catalyzed Syntheses of 3,5-Disubstituted Isoxazoles. Hansen, T.; Wu, P.; Fokin, V. V. J. Org. Chem. 2005, 70, 7761.
  75. Structurally Diverse Dendritic Libraries: A Highly Efficient Functionalization Approach Using Click Chemistry. Malkoch, M.; Schleicher, K.; Drockenmuller, E.; Hawker, C. J.; Russell, T. P.; Wu, P.; Fokin, V. V. Macromolecules. 2005, 38, 3663.
  76. Efficiency and Fidelity in a Click Chemistry Route to Triazole Dendrimers via the Cu(I)-Catalyzed Ligation of Azides and Alkynes. Wu, P.; Feldman, A. K.; Nugent, A. K.; Hawker, C. J.; Scheel, A.; Voit, B.; Pyun, J.; Frechet, J. M. J.; Sharpless, K. B.; Fokin, V.V. Angew. Chem. Int. Ed. 2004, 43, 3863.
  77. New d4 Dihydrides of Ru(IV) and Os(IV) with p-donor Ligands: M(H)2(chelate)(PiPr3)2 with Chelate = ortho-XYC6H4 with X, Y = O, NR; R = H or CH3 Ferrando-Miguel, G.; Wu, P.; Huffman, J. C.; Caulton, K. G. New J. Chem. 2005, 29, 193.
  78. Cu(I) and Cu(II) Complexes of a Pyridine-based Pincer Ligand. Vedernikov, A. N.; Wu, P.; Huffman, J. C.; Caulton, K. G. Inorg. Chim. Acta. 2002, 300, 103.