三缩四乙二醇

6-O-trityl-D-galactono-1,4-lactone

三苯基乙酰氯

2-formyl-2-(2,3-O-isopropylidene-5-O-trityl-D-ribofuranosyl)acetonitrile thiosemicarbazone

2-formyl-2-(2,3-O-isopropylidene-5-O-trityl-D-ribofuranosyl)acetonitrile