[{"from": "human", "value": "Describe this molecule. [C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][N][C@H1][Branch1][#Branch2][C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][N][Branch1][C][C][C@@H1][Branch1][=Branch1][C][Branch1][C][C][C][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch1][C][Branch1][C][C][C][C][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch2][C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][N][C@@H1][Branch1][C][C][C][=Branch1][C][=O][O][C]"}, {"from": "gpt", "value": "The molecule is a lipopeptide consisting of the methyl ester of a D-Phe-N-Me-L-Val-L-Ile-L-Phe-L-Ala hexapeptide, to the nitrogen of the D-phenylalanine residue of which is linked a C20 (icosanoyl) fatty-acyl chain. It is a major cell wall lipopeptide of Mycobacterium avium ssp. paratuberculosis (MAP), the causative agent of Johne's disease in cattle and other ruminants. It has a role as an antigen. It is a lipopeptide and a methyl ester."}]