3-DESMETHYLCOLCHICINE 7336-33-6 Acetamide, N-(5,6,7,9-tetrahydro-3-hydroxy-1,2,10-trimethoxy-9-oxobenzo[a]heptalen-7-yl)-, (S)- COLCHICINE,3-DESMETHYL Colchicine, O(3)-demethyl- NSC172946