儿茶酸基亚甲基醚；向日[花香]酸

protocatechuic acid

Protocatechuic Acid

protocatechuic-aldehyde

Protocatechuic acid

protocatechuic acid

protocatechuic acid dimethyl ether; veratric acid

protocatechuic acid

protocatechuic acid【有化】