Cyclo(L-prolyl-L-phenylalanyl)

(3S,8aS)-3-Benzylhexahydro-pyrrolo[1,2-a]pyrazine-1,4-dione; (3S-trans)-Hexahydro-3-(phenylmethyl)-pyrrolo[1,2-a]pyrazine-1,4-dione; (3S,8aS)-Hexahydro-3-(phenylmethyl)pyrrolo[1,2-a]pyrazine-1,4-dione; Cyclo(L-Phe-L-Pro); Cyclo(L-Pro-L-Phe); Cyclo(L-phenylalanyl-L-prolyl-); Cyclo(Phe-Pro); L-Phenylalanyl-L-proline Lactam; L-Prolyl-L-phenylalanine Diketopiperazine; Maculosin 2; Maculosine 2; SMFEI 02;