NEW TRICYCLIC ORTHO-FUSED NITROGEN CONTAINING COMPOUNDS

摘要

New tricyclic ortho-fused nitrogen containing compounds of the following formula: I wherein R and R1 are independently selected from hydrogen, fluoro, chloro, bromo and (C1-C4)alkoxy; A may be -CH2-, -CH2-CH2-, -CH=CH- or -(CH2)3-; X represents a nitrogen atom or the group CH; and salts therewith of pharmaceutically acceptable acids. The compounds possess an outstanding antireproductive utility.