(3S)-3-methyl-2,3-dihydrofuran

3-methyl-4-(4-triisopropylsilanyl-but-3-ynyl)-5-(3,7,11-trimethyl-dodeca-2,6,10-trienyl)-hexahydrocyclopenta[b]furan-6-one

4-but-2-ynyl-3,5-dimethyl-5-(3,7,11-trimethyl-dodeca-2,6,10-trienyl)hexahydrocyclopenta[b]furan-6-one

4-but-2-ynyl-3-methyl-5-(3,7,11-trimethyl-dodeca-2,6,10-trienyl)hexahydrocyclopenta[b]furan-6-ol

4-but-3-ynyl-3-methyl-5-(3,7,11-trimethyl-dodeca-2,6,10-trienyl)hexahydrocyclopenta[b]furan-6-ol