1-(Hydroxymethyl)-2-pyrrolidone 1-Hydroxymethyl-2-pyrrolidinone 15438-71-8 2-Pyrrolidinone, 1-(hydroxymethyl)- N-(Hydroxymethyl)-2-pyrrolidinone N-(Hydroxymethyl)-2-pyrrolidone N-Methylol-2-pyrrolidinone N-Methylol-2-pyrrolidone N-Methylolpyrrolidinone N-Methylolpyrrolidone NSC84227