methyl O-(benzyl-5-C-ethyl-4-O-levulinyl-2,3-di-O-methyl-β-D-glucopyranosyluronate)-(1→4)-2,3,6-tri-O-benzyl-α-D-glucopyranoside 、
乙酸酐 在
硫酸 作用下,
以65.5%的产率得到O-(benzyl 5-C-ethyl-4-O-levulinyl-2,3-di-O-methyl-β-D-glucopyranosyluronate)-(1→4)-1,3,6-tri-O-acetyl-2-O-benzyl-D-glucopyranose