国产乱对白精彩在线播放_亚洲国产午夜网站在线_国产在线国语对白_99re6免费视频 这里只有精品

Welcome to visit Changzhou Chengbang Chemical Co., Ltd. official website!

Collection ｜Homepage ｜中文版

More>>
1-Methyl-2-pyrrolidinone
Product name: 1-Methyl-2-pyrrolidinone
CAS NO: 872-50-4;2687-44-7
Molecular weight: 99.13 
EC NO: 212-828-1
Molecular formula: C5H9NO
InChI: InChI=1/C5H9NO/c1-6-4-2-3-5(6)7/h2-4H2,1H3
Structural formula:
  Order                   Back