1,4-diphenyl-2,3-benzo-7,7,8,8-tetramethyl-7,8-digermabicyclo[2,2,2]octadiene

联苯烯

1,4-diphenylnaphthalene

decamethylcyclopentagermane

2,2,4,4,6,6-hexamethyl-1,3,5-trioxa-2,4,6-trigermacyclohexane