2-Demethyl-N-trifluoroacetyl-deacetylcolchicine 86436-46-6 Acetamide, N-(2-hydroxy-9-oxo-1,3,10-trimethoxy-5,6,7,9-tetrahydrobenzo(a)heptalen-7-yl)-2,2,2-trifluoro- BRN 4829346 NSC 335989