2-氯-2,4,6-环庚三烯-1-酮

3-phenyl-4-(p-tolyl)-1-oxa-2,4-diazaspiro[4.6]undeca-2,6,8,10-tetraene

(1S,5R)-6-oxaspiro[bicyclo[3.2.2]nona[3,8]diene-2,2'-[1,3]dioxan]-7-one

7,7-dimethoxy-1,3,5-cycloheptatriene

2,4-环庚二烯-1-酮