119393-19-0
4-Oxa-1,2-diazaspiro[4.4]non-1-ene,3-methoxy-3-methyl-(9CI)
+
762-42-5
丁炔二酸二甲酯
→
~54%
79-20-9
乙酸甲酯
119393-27-0
dimethyl 1,2-diazaspiro[4.4]nona-1,3-diene-3,4-dicarboxylate