(1'S,5S)-5-(5'-trimethylsilyl-1'-hydroxypent-4'-ynyl)tetrahydrofuran-2-one

(1'R,5R)-5-(5'-trimethylsilyl-1'-hydroxypent-4'-ynyl)tetrahydrofuran-2-one

(5R)-3-[(S)-11-hydroxy-11-((S)-5-oxotetrahydrofuran-2-yl)undecyl]-5-methyl-3-(phenylsulfanyl)dihydrofuran-2-one

(5R)-3-[(S)-12-hydroxy-12-((S)-5-oxotetrahydrofuran-2-yl)dodec-6-en-8-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