(3S,6S)-3,6-diisobutylpiperazin-2-one 、
3-Carboxy-7-methoxy-4,5-dihydronaphth<2.1-d>isoxazol 、
( 3S,6S)-3,6-diiso-butyl-4-((1R,2R)-2-phenylcyclopropanecarbonyl)piperazin-2-one 以to furnish 289 (60 mg, 64% yield) as a white solid的产率得到(3S,6S)-3,6-diisobutyl-4-(7-methoxy-4,5-dihydronaphtho[2,1-d]isoxazole-3-carbonyl)piperazin-2-one