3,3,6,6-四甲氧基-1,4-环己二烯

1,4-环己二酮双乙二醇二缩酮

7,12,19,20,23,24-Hexaoxatetraspiro[5.1.2.1.5.2.2.2]tetracosane

cyclohexa-1,4-diene

8,13,21,22,25,26-hexaoxatetraspiro[6.1.2.1.6.2.2.2]hexacosane