rac-2-Ethoxy-3-(2-methyl-1H-indol-5-yl)-propionic acid ethyl ester 、
methanesulfonic acid 3-(5-methyl-2-phenyl-oxazol-4-yl)-propyl ester 以to give rac-2-ethoxy-3-{2-methyl-1-[3-(5-methyl-2-phenyl-oxazol-4-yl)-propyl]-1H-indol-5-yl}-propionic acid as orange viscous oil的产率得到rac-2-ethoxy-3-{2-methyl-1-[3-(5-methyl-2-phenyl-oxazol-4-yl)-propyl]-1H-indol-5-yl}-propionic acid