Methyl 4,6-O-Benzylidene-3-O-(tert-butyldimethylsilyl)-2-deoxy-2-C-((hydroxymethyl)methylene)-α-D-arabino-hexopyranoside

(2R,4aR,6S,8aS)-6-Methoxy-2-phenyl-7-[2-vinyloxy-eth-(Z)-ylidene]-hexahydro-pyrano[3,2-d][1,3]dioxine