(3S,6S)-3,6-diisobutyl-4-((5-phenylisoxazol-3-yl)methyl)piperazin-2-one 、
(3S,6S)-6-(2,2-dimethylpropyl)-3-isobutyl-piperazin-2-one 、
5-(4-氟苯基)异噁唑-3-甲醛 以to give the product 204 (73.5 mg, 40.3% yield) as a white solid的产率得到(3S,6S)-6-(2,2-dimethyl-propyl)-4-[5-(4-fluoro-phenyl)-isoxazol-3-ylmethyl]-3-isobutyl-piperazin-2-one