苯

(3aS,4S,5R,6aR)-5-((tetrahydro-2H-pyran-2-yl)oxy)-4-((trityloxy)methyl)hexahydropentalen-2(1H)-one

N-trityl-L-methionine

3-O-benzoyl-5-deoxy-1,2-O-isopropylidene-6-O-trityl-α-D-xylo-hexofuranose

2',3'-dideoxy-2',3'-didehydro-3'-fluoro-5'-O-trityluridine