Synonyms: Pyrrolo[1,2-a]pyrazine-1,4-dione,3-benzylhexahydro-, (3S,8aS)- (8CI); Pyrrolo[1,2-a]pyrazine-1,4-dione,hexahydro-3-(phenylmethyl)-, (3S-trans)-; Cyclo(L-Phe-L-Pro);Cyclo(L-Pro-L-Phe); Cyclo(L-phenylalanyl-L-prolyl-);Cyclo(L-prolyl-L-phenylalanyl); L-Phenylalanyl-L-proline lactam;L-Prolyl-L-phenylalanine diketopiperazine; Maculosin 2; Maculosine 2; SMFEI 02