86500-49-4 Formamide, N-(10-amino-5,6,7,9-tetrahydro-1,2,3-trimethoxy-9-oxobenzo(a)heptalen-7-yl)-, (S)- N-(10-Amino-5,6,7,9-tetrahydro-1,2,3-trimethoxy-9-oxobenzo(a)heptalen-7-yl)formamide N-Formyldeacetylcolchiceinamide