4-(4-methoxybenzyloxy)butyn-1-yl 2,3:5,6-di-O-isopropylidene-α-D-mannofuranoside

(S)-1-{(4R,5S)-5-[(R)-((R)-2,2-Dimethyl-[1,3]dioxolan-4-yl)-hydroxy-methyl]-2,2-dimethyl-[1,3]dioxolan-4-yl}-5-(4-methoxy-benzyloxy)-pent-2-yn-1-ol