(S)-4,7alpha-二甲基-2,3,7,7alpha-四氢-6H-茚-1,5-二酮

2-methyl-3-pyrrolidin-1-ylcyclopent-2-en-1-one

2-(2-bromoprop-2-enyl)-2-methylcyclopentane-1,3-dione

8-methoxy-3a-methyl-2,4,5,10-tetrahydrocyclopenta[a]fluoren-3-one

2-[2-(5-methoxy-2,3-dihydroinden-1-ylidene)ethyl]-2-methylcyclopentane-1,3-dione