3-[(1S,2S)-2-((S)-1,5-Dimethyl-hexyl)-1-methyl-5-oxo-cyclopentyl]-propionic acid

(1R,7aR)-1-((R)-1,5-Dimethyl-hexyl)-7a-methyl-5-oxo-2,3,5,6,7,7a-hexahydro-1H-indene-4-carboxylic acid

(1R,7aR)-1-[(1R)-1,5-dimethylhexyl]-1,2,3,6,7,7a-hexahydro-7a-methyl-5H-inden-5-one