(4R,6aR)-6a-Isopropyl-4-methyl-4-[2-(2-methyl-[1,3]dioxolan-2-yl)-ethyl]-4,5,6,6a-tetrahydro-cyclopenta[b]furan-2-one

(R)-5-Isopropyl-2-methyl-2-[2-(2-methyl-[1,3]dioxolan-2-yl)-ethyl]-cyclopentanone

(3R,3aS,4R,6aR)-6a-Isopropyl-2-methoxy-4-methyl-4-[2-(2-methyl-[1,3]dioxolan-2-yl)-ethyl]-hexahydro-cyclopenta[b]furan-3-ol

(2R,5R)-2-Hydroxy-2-isopropyl-5-methyl-5-[2-(2-methyl-[1,3]dioxolan-2-yl)-ethyl]-cyclopentanone

(2S,5R)-2-Hydroxy-2-isopropyl-5-methyl-5-[2-(2-methyl-[1,3]dioxolan-2-yl)-ethyl]-cyclopentanone