trans-1,3,9-trimethyl-5-oxo-5,6,6a,6b-tetrahydro-7H-benzofluorene

2-<2-Methoxycarbonylmethyl-5-methyl-indan-1-yliden>-bernsteinsaeure dimethylester

7-Methyl-1,2,3,4,4a,9a-hexahydro-fluoren-2-on

9-methylbenzofluorene

1,3,9-trimethylbenzofluorene