cyclic:cycloalkanecarboxylic acid CO,H CO2H (succinic anhydride) (maleic anhydride CO,H (benzoic） CO,H (salicylic) OH (phthalic anhydride) cyclic: cycloalkanecarboxylic acid O O O O O O (succinic anhydride) (maleic anhydride) O O O (phthalic anhydride) CO2H CO2H CO2H CO2H OH (benzoic) (salicylic)