| 摘要 |
1496492 Lysergic acid derivatives SANDOZ Ltd 25 Nov 1974 [28 Nov 1974] 23690/77 Divided out of 1496491 Heading C2C Novel compounds of the Formula I wherein R<SP>1</SP> is C 3-6 alkyl and the C 1-4 alkyl esters thereof, may be prepared by alkylation of an ester III optionally followed by hydrolysis of the ester group. The compounds I may be used in the form of reactive functional derivatives to prepare dihydroergopeptine derivatives as disclosed and claimed in the parent Specification. |
