5-Amino-4-oxo-1,2,4,5,6,7-hexahydro-azepino[3,2,1-HI]indole-2-carboxylic acid
(2S,5S)-5-amino-4-oxo-1,2,4,5,6,7-hexahydroazepino[3,2,1-hi]indole-2-carboxylic acid is a non-proteinogenic amino acid derivative consisting of L-proline ortho- and peri-fused on to (3S)-3-amino-1,3,4,5-tetrahydro-2H-1-benzazepin-2-one. It is functionally related to a L-proline.