2-<(3,8-Dimethyl-2-methoxy-5,6-dihydroxy-7,8-dihydro)-5-naphthyl>propionic acid ethylester

(4aS,7R)-1,7-Dimethyl-8,9-dihydro-7H-4a,7-methano-benzocycloheptene-2,6-dione

2,8,8-Trimethyl-5,6,7,8-tetrahydro-phenanthrene-3,4-dione

6-Methoxy-5-methyl-naphthalene-2-carboxylic acid methyl ester

6-Methoxy-5-methyl-1,2,3,4-tetrahydro-naphthalene-2-carboxylic acid