2-(5-{2-[2-(5-{3-[5-(2-dimethylamino-pentyl)-tetrahydro-furan-2-yl]-2-hydroxy-1-methyl-butyl}-tetrahydro-furan-2-yl)-propionyloxy]-1-methyl-pentyl}-tetrahydro-furan-2-yl)-propionic acid benzyl ester

(R)-2-((2R,6S,7S)-7a-Hydroxy-7-methyl-4,4-dioxo-6-propyl-hexahydro-1,5-dioxa-4λ6-thia-inden-2-yl)-propionic acid methyl ester

2-(5-{2-(tert-butyl-dimethyl-silanyloxy)-3-[5-(2-dimethylamino-pentyl)-tetrahydro-furan-2-yl]-1-methyl-butyl}-tetrahydro-furan-2-yl)-propionic acid 1-{1-[5-(1-benzyloxycarbonyl-ethyl)-tetrahydro-furan-2-yl]-ethyl}-butyl ester

(R)-2-[(2R,5S)-5-((1S,2S)-2-Hydroxy-1-methyl-pentyl)-tetrahydro-furan-2-yl]-propionic acid methyl ester

(R)-2-((2R,5S)-5-{(1R,2S,3R)-2-(tert-Butyl-dimethyl-silanyloxy)-3-[(2R,5S)-5-((R)-2-dimethylamino-pentyl)-tetrahydro-furan-2-yl]-1-methyl-butyl}-tetrahydro-furan-2-yl)-propionic acid

(R)-2-((2R,6S,7S)-7-Methyl-4,4-dioxo-7a-phenylsulfanyl-6-propyl-hexahydro-1,5-dioxa-4λ6-thia-inden-2-yl)-propionic acid methyl ester