2,5-Piperazinedione, 3,6-dimethyl- 3,6-Dimethyl-2,5-piperazinedione 3,6-Dimethylpiperazine-2,5-dione 5-24-05-00383 (Beilstein Handbook Reference) 5625-46-7 Alanine diketopiperazine BRN 0082120 Dimethyl-3,6 dioxo-2,5 piperazine [French] EINECS 227-058-1