N,N'-Diacetylglycine anhydride (CAS NO.3027-05-2), its Synonyms are 1,4-Diacetylpiperazine-2,5-dione ; 2,5-Piperazinedione, 1,4-diacetyl- ; 1,4-Diacetyltetrahydro-2,5-pyrazinedione .