12'-Hydroxy-2'-(1-methylethyl)-5'-alpha-(2-methylpropyl)ergotaman-3',6',18-trione 12'-Hydroxy-5'alpha-isobutyl-2'-isopropylergotaman-3',6',18-trione 4-25-00-00964 (Beilstein Handbook Reference) 511-09-1 BRN 0078810 EINECS 208-121-2 Ergocryptine Ergotaman-3',6',18-trione, 12'-hydroxy-2'-(1-methylethyl)-5'-(2-methylpropyl)-, (5'alpha)- (9CI) NSC 169479 alpha-Ergocryptine alpha-Ergokryptine