8.alpha.-acylamino ergolines and use as pharmaceutical agents

A compound of Formula I ##STR8## in which CC each independently is a single or double bond;

• R.sup.2 is optionally substituted C.sub.1-7 -alkyl, or C.sub.2-7 -alkenyl, CH.sub.2 --O--C.sub.1-4 -alkyl, or CH.sub.2 --S--C.sub.1-4 -alkyl;
• R.sup.6 is C.sub.2-6 alkyl, C.sub.3-6 -alkenyl, or C.sub.3-5 -cycloalkyl-C.sub.1-2 -alkyl;
• R.sup.8 is --CXR.sup.3,
• R.sup.3 is hydrogen or optionally substituted C.sub.1-6 -alkyl;
• or a pharmaceutically acceptable acid addition salt thereof.