1-(2-Hydroxyethyl)-2-pyrrolidinone 1-(2-Hydroxyethyl)pyrrolidin-2-one 2-Pyrrolidinone, 1-(2-hydroxyethyl)- 3445-11-2 5-21-06-00341 (Beilstein Handbook Reference) BRN 0112181 EINECS 222-359-4 N-(2-Hydroxyethyl)-2-pyrrolidone N-2-Hydroxyethylpyrrolidin-2-one