methyl (2R)-3-(tert-butyldiphenylsilyloxy)-2-[2,3,4,6-tetra-O-acetyl-β-D-mannopyranosyl-(1->2)-6-O-(tert-butyldiphenylsilyl)-3,4-O-(2,3-dimethoxybutane-2,3-diyl)-α-D-glucopyranosyloxy]propanoate

methyl (2R)-2-[2,3,4,6-tetra-O-acetyl-β-D-mannopyranosyl-(1->2)-3,4-O-(2,3-dimethoxybutane-2,3-diyl)-α-D-glucopyranosyloxy]-3-hydroxypropanoate