3-Demethylcolchicine 7336-33-6 Acetamide, N-(5,6,7,9-tetrahydrohydroxy-?,?,10-trimethoxybenzo[a]heptalen-7-yl)- BENZOHEPTALEN-9(5H)-ONE,7-ACETAMIDO-6,7-DIHYDRO-L Desmethylcolchicine N-(5,6,7,9-Tetrahydro-3-hydroxy-1,2,10-trimethoxy-9-oxobenzo[a]heptalen-7-ylacetamide (S)- NSC50164 O3-Demethyl colchicine O3-Demethylcolchicine