[{"from": "human", "value": "Describe this molecule. [C][C][Branch2][=Branch1][#Branch2][C@H1][Branch2][Ring2][P][C][=Branch1][C][=O][N][C][C][=Branch1][C][=O][N][C@H1][Branch2][Ring1][=Branch2][C][=Branch1][C][=O][N][C@H1][Branch1][N][C][Branch1][Branch1][S][S][Ring1][P][Branch1][C][C][C][C][=Branch1][C][=O][O][C][C][=C][C][=C][C][=C][Ring1][=Branch1][N][C][=Branch1][C][=O][C@H1][Branch1][=N][C][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][N][C]"}, {"from": "gpt", "value": "The molecule is a heterodetic cyclic peptide that is a cyclic enkephalin analogue, having D-penicillaminyl residues located at positions 2 and 5, which form the heterocycle via a disulfide bond. It has a role as a delta-opioid receptor agonist."}]