2-Piperazinone, 3,3-dimethyl-4-(2-hydroxyethyl)- 2-Piperazinone, 4-(2-hydroxyethyl)-3,3-dimethyl- 22492-72-4 3,3-Dimethyl-4-(2-hydroxyethyl)-2-piperazinone 5-24-01-00262 (Beilstein Handbook Reference) BRN 0130060 Dimethyl-3,3 (hydroxy-2 ethyl)-4 oxo-2 piperazine [French]