SUBSTITUTED BENZIMIDAZOLONES AND SALTS THEREOF, METHODS OF PREPARATION AND PHARMACEUTICAL COMPOSITIONS THEREOF

摘要

Compounds of the formula wherein R1 is hydrogen, halogen or methoxy; R2 is hydrogen or lower alkyl; R3 is hydrogen or lower alkyl; R4 is hydrogen, lower alkyl or alkenyl of 3 carbon atoms; and n is 2 to 6; and non-toxic, pharmacologically acceptable acid addition salts thereof. The compounds as well as their salts are useful as antiallergics and hypotensives.