title: Chemical-structural properties of tetracycline derivatives. 1. Molecular structure and conformation of the free base derivatives.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D002751:Chlortetracycline; D003460:Crystallization; D006860:Hydrogen Bonding; D008968:Molecular Conformation; D010118:Oxytetracycline; D013237:Stereoisomerism; D013754:Tetracyclines / Q000032:analysis
chemical_list: D013754:Tetracyclines; D002751:Chlortetracycline; D010118:Oxytetracycline