5-((叔丁氧基羰基氨基)甲基)-1,2,4-噁二唑-3-羧酸乙酯

(5-甲基-1,2,4-噁唑-3-基)甲醇

diethyl 1,2,5-oxadiazole-3,4-dicarboxylate 2-oxide