63917-70-4 BENZO(a)HEPTALEN-9(5H)-ONE, 7-ACETAMIDO-6,7-DIHYDRO-10-ETHYLAMINO-1,2,3-TRIMETHO Benzo(a)heptalen-9(5H)-one, 7-acetamido-6,7-dihydro-10-ethylamino-1,2,3-trimethoxy- Ethylaminocolchicide Ethylcolchaminone