methyl 2-ethoxy-7-hydroxy-1,3-benzodioxole-5-carboxylate

methyl 7-phenylmethoxy-1,3-benzodioxole-5-carboxylate

7-羟基-1,3-苯并二氧戊环-5-羧酸甲酯

7-甲氧基-1,3-苯并二氧化物-5-羧酸