英文名称
1-(3-chloropropyl)cyclopropane-1-carbonitrile;diethyl but-2-ynedioate;ethyl 2-(2-ethoxy-2-oxoethyl)spiro[6,7-dihydro-5H-[1,2,4]oxadiazolo[2,3-a]pyridine-8,1'-cyclopropane]-2-carboxylate;ethyl 3-(2-ethoxy-2-oxoethyl)spiro[6,7-dihydro-5H-[1,2,4]oxadiazolo[4,3-a]pyridine-8,1'-cyclopropane]-3-carboxylate