(3S,6R)-3-isobutyl-6-phenyl-[1,4]diazepan-2-one 、
5-(4-氟苯基)异噁唑-3-羧酸 、
(3S,6S)-4-cinnamoyl-3,6-diisobutylpiperazin-2-one 以to furnish 420 (12 mg, 13.6% yield) as a white solid的产率得到(3S,6S)-3-isobutyl-6-phenyl-4-(5-(4-fluorophenyl)isoxazole-3-carbonyl)-1,4-diazepan-2-one