2-(2-hydroxyethyl)-5-phenyl-4H-pyrazol-3-one

2-(5-amino-3,4-dihydropyrazol-2-yl)ethanol

N'-(2-羟基乙基)-5-甲基-3-异恶唑甲酰肼

2-(4-氨基-1H-吡唑-1-基)乙醇

2-(4,5-二氢-1H-吡唑-1-基)乙醇