title: NMR spectra of tetracyclines: assignment of additional protons.
mesh_terms: D002751:Chlortetracycline / Q000032:analysis; D007659:Ketones / Q000032:analysis; D009682:Magnetic Resonance Spectroscopy; D010118:Oxytetracycline / Q000032:analysis; D010636:Phenols / Q000032:analysis; D011522:Protons; D013752:Tetracycline / Q000032:analysis*
chemical_list: D007659:Ketones; D010636:Phenols; D011522:Protons; D013752:Tetracycline; D002751:Chlortetracycline; D010118:Oxytetracycline