2,4-二氟苯酚 、
9-溴-1-壬醇 、
9-(2,4-difluoro-phenoxy)-nonan-1-ol 、
9-(2,4-difluoro-phenoxy)-nonanoic acid 、 (R)-benzyl 3-amino-4-(dimethylamino)butanoate dihydrochloride 以to produce (R)-4-dimethylamino-3-[9-(2,4-difluoro-phenoxy)-nonanoylamino]-butyric acid benzyl ester, which的产率得到(R)-4-dimethylamino-3-[9-(2,4-difluoro-phenoxy)-nonanoylamino]-butyric acid benzyl ester