(2''S,2'R,5S,13'S)-3-[2'-(tert-butyldimethylsilyl)oxy-13'-hydroxy-13'-(5''-oxotetrahydrofuran-2''-yl)tridecanyl]-5-methyl-2,5-dihydrofuran-2-one

(5R)-3-[(S)-12-hydroxy-12-((S)-5-oxotetrahydrofuran-2-yl)dodecyl]-5-methyl-3-(phenylsulfanyl)dihydrofuran-2-one

(5R)-3-[(S)-14-hydroxy-14-((S)-5-oxotetrahydrofuran-2-yl)tetradecyl]-5-methyl-3-(phenylsulfanyl)dihydrofuran-2-one

(5R)-3-[(S)-14-hydroxy-14-((S)-5-oxotetrahydrofuran-2-yl)tetradec-8-en-10-ynyl]-5-methyl-3-(phenylsulfanyl)dihydrofuran-2-one

(2''S,2'R,5S,13'S)-3-[2'-(tert-butyldimethylsilyl)oxy-13'-hydroxy-13'-(5''-oxotetrahydrofuran-2''-yl)tridec-7'-en-9'-ynyl]-5-methyl-2,5-dihydrofuran-2-one