CAS: 872-50-4 Molecular Formula: C5H9NO Molecular Weight (g/mol): 99.133 MDL Number: MFCD00003193 InChI Key: SECXISVLQFMRJM-UHFFFAOYSA-N Synonym: 1-methyl-2-pyrrolidinone,n-methyl-2-pyrrolidone,n-methylpyrrolidone,1-methyl-2-pyrrolidone,methylpyrrolidone,m-pyrol,n-methyl-2-pyrrolidinone,n-methylpyrrolidinone,1-methylpyrrolidinone,2-pyrrolidinone, 1-methyl PubChem CID: 13387 ChEBI: CHEBI:7307 IUPAC Name: 1-methylpyrrolidin-2-one SMILES: CN1CCCC1=O