Phosphoric acid dibenzyl ester (1R,3R,4R,5R,7R,16R,17R,18R,19R)-19-benzyloxy-17,18-bis-(bis-benzyloxy-phosphoryloxy)-5-prop-2-ynyloxy-2,6,9,14,20-pentaoxa-tricyclo[14.3.1.03,7]icos-4-yl ester

(2''S,3''S) 5-O-allyl-3-O-(6'-O-allyl-2'-O-benzyl-3',4'-di-O-(2'',3''-dimethoxybutane-2'',3''-diyl)-α-D-glucopyranosyl)-1,2-O-isopropylidene-α-D-ribofuranoside