C07D457/08 - CPC Classification

Heterocyclic compounds containing indolo [4, 3-f, g] quinoline ring systems, e.g. derivatives of ergoline, of the formula:, e.g. lysergic acid with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached in position 8; Lysergic acid amides in which the amide nitrogen is a member of a heterocyclic ring

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