(2R,3R,4S,5R)-2-(6,8-Dimethyl-2,3-dihydro-pyrrolo[2,3-g]quinolin-1-yl)-5-trityloxymethyl-tetrahydro-furan-3,4-diol

(2R,3R,4R)-2,3-dihydroxy-5-trityloxy-4-pentanolide

(3R,4R,5R)-4-hydroxy-3-[(1S)-1-hydroxy-1-(3,4-methylenedioxyphenyl)methyl]-5-trityloxymethyldihydro-2(3H)-furanone

(3R,4R,5R)-3-((R)-Benzo[1,3]dioxol-5-yl-hydroxy-methyl)-4-hydroxy-5-trityloxymethyl-dihydro-furan-2-one

(2R,3S,4R)-3-hydroxy-2-phenoxythiocarbonyloxy-5-trityloxy-4-pentanolide