2,3-dicyclopropylcycloprop-2-en-1-one

1,2,3,4,5,6-hexacyclopropylbenzene

2,3,5,6-tetracyclopropylcyclohexa-2,5-diene-1,4-dione

1-methyl-1-[2-(1-methylcyclopropyl)ethynyl]cyclopropane