4-Butoxyphenylacetic acid (CAS NO.4547-57-3), its Synonyms are (p-Butoxyphenyl)acetic acid ; 4-Butoxybenzeneacetic acid ; 4-n-Butoxyphenylacetic acid ; Acetic acid, (p-butoxyphenyl)- ; Benzeneacetic acid, 4-butoxy- (9CI) .