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. Author manuscript; available in PMC: 2012 Oct 6.
Published in final edited form as: Angew Chem Int Ed Engl. 2011 Jul 14;50(35):8051–8056. doi: 10.1002/anie.201101817

Scheme 1.

Scheme 1

Structural formulae of tris(triazolylmethyl)amine-based ligands and BARAC-biotin. BTTAA=2-[4-({bis[(1-tert-butyl-1H-1,2,3-triazol-4-yl)methyl]amino}methyl)-1H-1,2,3-triazol-1-yl]acetic acid, BTTES=2-[4-({bis[(1-tert-butyl-1H-1,2,3-triazol-4-yl)methyl]amino}methyl)-1H-1,2,3-triazol-1-yl]ethyl hydrogen sulfate, TBTA=tris[(1-benzyl-1H-1,2,3-triazol-4-yl)methyl]amine, THPTA=tris[(1-hydroxypropyl-1H-1,2,3-triazol-4-yl)methyl]amine, BARAC=biarylazacyclooctynone