[{"from": "human", "value": "Describe this molecule. [C][C][N][Branch1][Ring1][C][C][C][C][S][=Branch1][C][=O][=Branch1][C][=O][C@@H1][C][C][N][C@H1][Ring1][Branch1][C][=Branch1][C][=O][O][C@@H1][Branch2][Ring2][#C][C@@H1][Branch2][Ring2][#Branch2][/C][=C][/C][=Branch1][C][=O][N][C][/C][=C][/C][=Branch2][Ring1][O][=C][/C@H1][Branch2][Ring1][Branch1][C][C][=Branch1][C][=O][C][C][=N][C][=Branch1][Branch1][=C][O][Ring1][Branch1][C][Ring2][Ring1][N][=O][O][/C][C][C][Branch1][C][C][C]"}, {"from": "gpt", "value": "The molecule is a macrolide that is pristinamycin IIA in which the double bond between positions 26 and 26a of the pyrroline ring has been reduced and position 26R carries a [2-(diethylamino)ethyl]sulfonyl group. It is a semi-synthetic streptogramin antibiotic and often used as a mixture with quinupristin for the treatment of vancomycin-resistant Enterococcus faecium. It has a role as an antibacterial drug and a protein synthesis inhibitor. It is a macrolide, a member of 1,3-oxazoles, a cyclic ketone, an enamide, a secondary alcohol, a secondary carboxamide, a tertiary carboxamide, a sulfone, a tertiary amino compound, a carboxylic ester and a macrolide antibiotic. It is functionally related to a pristinamycin IIA."}]