Carbostyril :: Carbostyril (n.) A white crystalline substance, C9H6N.OH, of acid properties derived from one of the amido cinnamic acids..
Hydrocarbostyril :: Hydrocarbostyril (n.) A white, crystalline, nitrogenous hydrocarbon, C9H9NO, obtained from certain derivatives of cinnamic acid and closely related to quinoline and carbostyril..