(3S,6S)-3-isobutyl-6-propyl-piperazin-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 304 (25 mg, 60% yield) as a white solid的产率得到(3S,6S)-4-(7-fluoro-4,5-dihydronaphtho[2,1-d]isoxazole-3-carbonyl)-3-isobutyl-6-propylpiperazin-2-one