(3a'R,4'R,7'R,7a'R)-4'-((3-acetyl-4-hydroxy-8-methyl-2-oxo-2H-chromen-7-yl)oxy)-7'-methoxytetrahydrospiro[cyclopentane-1,6'-[1,3]dioxolo[4,5-c]pyran]-2'-one 在
吡啶 、
potassium acetate 、 lithium perchlorate 作用下,
以
乙醇 为溶剂,
生成 [(7R,8R,9S,10R)-8-hydroxy-7-[4-hydroxy-3-[(E)-N-methoxy-C-methylcarbonimidoyl]-8-methyl-2-oxochromen-7-yl]oxy-10-methoxy-6-oxaspiro[4.5]decan-9-yl] N-prop-2-ynoxycarbamate