2-BROMO-12'-HYDROXY-2'-((1S)-1-METHYLPROPYL)-5'-(2-METHYLPROPYL)-ERGOTAMAN-3',6',18-TRIONE, (5'.ALPHA.)-
2-bromo-12'-hydroxy-2'-((1s)-1-methylpropyl)-5'-(2-methylpropyl)-ergotaman-3',6',18-trione, (5'.alpha.)-