72894-00-9
5-butyl-1H-pyrazole-3-carboxylic acid ethyl ester
→
~69%
92933-48-7
5-Butyl-1H-pyrazole-3-carboxylic acid
102540-71-6
辛酸, 2,4-二羰基-, 乙基酯
60415-21-6
2,4-dioxo-octanoic acid
591-78-6
2-己酮