英文名称
Ethyl 2-(2-ethoxy-2-oxoethyl)spiro[5,6-dihydro-[1,2,4]oxadiazolo[3,2-c][1,4]oxazine-8,1'-cyclopropane]-2-carboxylate;ethyl 3-(2-ethoxy-2-oxoethyl)spiro[5,6-dihydro-[1,2,4]oxadiazolo[3,4-c][1,4]oxazine-8,1'-cyclopropane]-3-carboxylate;ethyl 3-methylsulfonyloxy-4-oxospiro[6,7-dihydropyrimido[2,1-c][1,4]oxazine-9,1'-cyclopropane]-2-carboxylate