(3S,6S)-3,6-diisobutyl-4-(4-phenoxybenzoyl)piperazin-2-one 、
(3S,6S)-3-isobutyl-6-isopropylpiperazin-2-one 、
5-(4-氟苯基)-1,2,4-噁二唑-3-羧酸 以to give the product 295 (108.6 mg, 58.2% yield) as white solids的产率得到(3S,6S)-4-(5-(4-fluorophenyl)-1,2,4-oxadiazole-3-carbonyl)-3-isobutyl-6-isopropylpiperazin-2-one