- 1,3,4,16B-TETRAHYDRO-2H,10H-INDOLO[2,1-C]PYRAZINO-[1,2-A][1,4]BENZODIAZEPINES USEFUL AS SEROTONIN-2 RECEPTOR ANTAGONISTS
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The invention relates to 1,3,4,16b-tetrahydro-2H,10H-indolo 2, 1-c!pyrazino 1,2-a! 1,4!benzodiazepine derivatives of the formula I, STR1 wherein R 1 is hydrogen, lower alkyl, C 3-7-alkenyl, C. sub.3-7-alkynyl, 3 to 7 ring-membered cycloalkyl, C 2-7-alkyl
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