2-methyl-2-(3-oxobutyl)cyclopentane-1,3-dione

2-甲基-1,3-环戊二酮

(+)-六氢-3a-羟基-7a-甲基-1H-茚-1,5(6H)-二酮

methyl (2R,3aS)-6-ethylenedioxy-3a-methyl-3-oxo-2,3,3a,4,5,6-hexahydro-1H-indene-2-carboxylate

7A-甲基-2,3,5,6,7,7A-六氢-1H-茚-1,5-二酮