Brevianamide F

Cyclo(L-Trp-L-Pro-)

Cyclo(L-Pro-L-Trp-)

(3S,8aα)-3β-(1H-Indole-3-ylmethyl)octahydropyrrolo[1,2-a]pyrazine-1,4-dione

(3S)-2,3,6,7,8,8aα-Hexahydro-3β-(1H-indol-3-ylmethyl)pyrrolo[1,2-a]pyrazine-1,4-dione