(S)-N-(4-Formyl-5,6,7,9-tetrahydro-1,2,3,10-tetramethoxy-9-oxobenzo(a)heptalen-7-yl)acetamide 2730-82-7 4-Formylcolchicine Acetamide, N-(4-formyl-5,6,7,9-tetrahydro-1,2,3,10-tetramethoxy-9-oxobenzo(a)heptalen-7-yl)-, (S)- NSC 328403