[{"from": "human", "value": "Please give me some details about this molecule. [C][N][C@@H1][Branch2][Ring1][Branch2][C][S][C@H1][Ring1][Branch1][C@H1][C][S][C][=Branch1][Ring2][=N][Ring1][Branch1][C][=C][C][=C][C][=C][Ring1][=Branch1][O][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a pyochelin that has S-stereochemistry at the thioaminal centre; the diastereoisomer with R-stereochemistry at this centre is pyochelin I. Pseudomonas aeruginosa produces a mixture of pyochelin I (major) and pyochelin I (minor) via condensation of salicylic acid and two molecules of cysteine. The enantiomeric compounds, enant-pyochelin I and II, are produced by Pseudomonas fluorescens."}]