2,3-dimethyl-5-germaspiro[4.4]nona-2,7-diene

2,4,5-三甲基吡啶

1,2-dimethyl-4-prop-1-enylcyclohexene

6,7-二甲基-1,2,3,4-四氢萘

5,6-二甲基-2,3-二氢-异吲哚-1-酮