1,4-anhydro-2,3-O-isopropylidene-D-ribitol

1-O-tert-butyldimethysilyl-2,3-O-isopropylidene-5-O-tritylribitol-4-ulose

Z-4-chloro-6-(1',2'-dideoxy-5'-hydroxy-3',4'-O-isopropylidene-6'-O-trityl-D-ribo-hex-1'-enyl)-2-methylpyrimidine