(2R,3S,4R,5S)-6-(phenylhydrazinylidene)hexane-1,2,3,4,5-pentol

氯化重氮苯

1-(5-methyl-1-phenyl-1H-pyrazol-3-yl)-ethanone

盐酸苯肼

5-甲基异恶唑-3-甲酸