1,2-恶唑-3,5-二甲酸

5-乙氧基-4,5-二氢异噁唑-3-羧酸乙酯

Ethyl 5-(4-methoxyphenyl)-1,2-oxazole-3-carboxylate

5-氨基-4-氰基-3-异恶唑甲酸乙酯

ethyl 7-chloro-2H-1,2,4-benzoxadiazine-3-carboxylate