埃罗替尼中间体一;7-氯喹那啶(7-CQ);3,4-二羟基苯基酸乙酯;3,4一二羟基苯甲酸乙酯;原儿茶酸乙酯;

3,4-dihydroxybenzoic acid ethyl ether;Ethyl-3,4-dihydroxybenzoate;Ethyl Protocatechuate;EDHB;Protocatechuic acid ethyl ester;