2826-82-6 Acetamide, N-(2-(acetyloxy)-5,6,7,9-tetrahydro-1,3,10-trimethoxy-9-oxobenzo(a)heptalen-7-yl)-, (S)- Colchicine, O2-demethyl-, acetate (ester) O2-Demethylcolchicine acetate (ester)