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          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:
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