63989-75-3 Benzamide, N-(5,6,7,9-tetrahydro-1,2,3,10-tetramethoxy-9-oxobenzo[a]heptalen-7-yl)-, (S)- COLCHICINE, N-BENZOYL-DEACETYL Colchicinic acid, N-benzoyltrimethyl-, methyl ether N-BENZOYL-DEACETYLCOLCHICINE NSC33410