(3S,6R)-3-isobutyl-6-phenyl-[1,4]diazepan-2-one 、
(1R,2R)-trans-2-phenyl-1-cyclopropanecarboxylic acid 、
(3S,6S)-4-cinnamoyl-3,6-diisobutylpiperazin-2-one 以to furnish 418 (30 mg, 37.8% yield) as a white solid的产率得到(3S,6S)-3-isobutyl-6-phenyl-4-((1R,2R)-2-phenylcyclopropanecarbonyl)-1,4-diazepan-2-one