aqueous potassium hydrogen sulfate 、
ethyl 5-t-butoxycarbonyl-4,6-ethano-4,5,6,7-tetrahydropyrazolo[4,3-c]pyridin-2-acetate 、
ethyl 5-t-butoxycarbonyl-4,6-ethano-4,5,6,7-tetrahydropyrazolo[4,5-c]pyridin-1-acetate 、
2-甲氧基苯乙酸 生成 ethyl 5-(α-methoxyphenylacetyl)-4,6-ethano-4,5,6,7-tetrahydropyrazolo[4,3-c]pyridin-2-acetate 、 ethyl 5-(α-methoxyphenylacetyl)-4,6-ethano-4,5,6,7-tetrahydropyrazolo[4,5-c]pyridin-1-acetate