3-((5-hydroxy-2-(3-hydroxy-4-methoxyphenyl)-4-oxochroman-7-yl)oxy)propane-1-sulfonic acid 、
氢氧化钾 在
乙醇 、
3-((5-hydroxy-2-(3-hydroxy-4-methoxyphenyl)-4-oxochroman-7-yl)oxy)propane-1-sulfonic acid potassium salt 作用下,
以
甲醇 为溶剂,
以to give 3-((5-hydroxy-2-(3-hydroxy-4-methoxyphenyl)-4-oxochroman-7-yl)oxy)propane-1-sulfonic acid potassium salt (Compound 14) (65 mg)的产率得到3-((5-hydroxy-2-(3-hydroxy-4-methoxyphenyl)-4-oxochroman-7-yl)oxy)propane-1-sulfonic acid potassium salt