32711-02-7
(3,5-dimethyl-1H-pyrazol-4-yl)acetic acid ethyl ester
→
~11%
32701-75-0
(3,5-二甲基-1H-吡唑-4-基)乙酸
123-54-6
乙酰丙酮
18835-02-4
3-乙酰基-4-氧代戊酸乙酯