(3S,6S)-3,6-diisobutylpiperazin-2-one 、
7-fluoro-4,5-dihydronaphtho[2,1-d]isoxazole-3-carboxylic acid 、
( 3S,6S)-3,6-diiso-butyl-4-((1R,2R)-2-phenylcyclopropanecarbonyl)piperazin-2-one 以to furnish 302 (28 mg, 63.2% yield) as a white solid的产率得到(3S,6S)-3,6-diisobutyl-4-(7-fluoro-4,5-dihydronaphtho[2,1-d]isoxazole-3-carbonyl)piperazin-2-one