2,3-Didemethylcolchicine 2,3-Dimethylcolchicine 57866-21-4 Acetamide, N-(5,6,7,9-tetrahydro-2,3-dihydroxy-1,10-dimethoxy-9-oxobenzo(a)heptalen-7-yl)-, (S)- Acetamide, N-(5,6,7,9-tetrahydro-2,3-dihydroxy-1,10-dimethyoxy-9-oxobenzo(a)heptalen-7-yl)-, (S)- NSC 354974