1H-Thieno(3,4-d)imidazole-4-pentanoic acid, hexahydro-2-oxo-, hydrazide, (3aS,4S,6aR)- 1H-Thieno(3,4-d)imidazole-4-pentanoic acid, hexahydro-2-oxo-, hydrazide, (3aS-(3aalpha,4beta,6aalpha))- 66640-86-6 Biotin hydrazide