(3S,6S)-3,6-diisobutyl-4-(4-phenoxybenzoyl)piperazin-2-one 、
(3S,6S)-3-isobutyl-6-phenylpiperazin-2-one 、
5-(2-噻吩基)-3-异恶唑酸 以to give the product 110 (63.2 mg, 70.1% yield) as pale yellow solid的产率得到(3S,6S)-3-isobutyl-6-phenyl-4-(5-(thiophen-2-yl)isoxazole-3-carbonyl)piperazin-2-one