(4-{3-[(R)-((2S,5R)-2,5-dimethyl-piperazin-1-yl)-(3-hydroxy-phenyl)-methyl]-benzoyl}-piperazin-1-yl)-acetic acid ethyl ester 、
苯甲醛 以to give 0.61 g (34%) of the desired compound as a light yellow solid的产率得到(4-{3-[(R)-[(2S,5R)-4-benzyl-2,5-dimethyl-piperazin-1-yl]-(3-hydroxy-phenyl)-methyl]-benzoyl}-piperazin-1-yl)-acetic acid ethyl ester