3,5-Dimethoxy-4-hydroxybenzoic acid ethyl ester 3943-80-4 4-10-00-02002 (Beilstein Handbook Reference) BENZOIC ACID, 3,5-DIMETHOXY-4-HYDROXY-, ETHYL ESTER BRN 2113673 Ester etylowy kwasu syringowego [Polish] Ethyl syringate