DERIVATIVES OF ERGOPEPTIDE ALKALOIDS, PROCESS FOR THEIR PREPARATION AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM

摘要

This invention provides compounds of I wherein R1 is benzyl or benzyl substituted by hydroxy, chlorine, fluorine, amino, amido, (C2-5) alkanoylamino, (C1-4) alkyl, (C1-4) alkylamino, (C1-4) alkoxy, (C1-4) alkylamido, di[(C1-4) alkyl]amino, or di[(C1-4) alkyl]amino, R2, R4 and R5 are each (C1-4) alkyl, and R3 is (C2-4) alkyl are prolactin secretion promoters.