title: X-ray studies on piroxicam modifications.
abstract: The anti-inflammatory drug piroxicam, 4-hydroxy-2-methyl-N-(2-pyridyl)2H-1,2- benzothiazine-3-carboxamide-1,1-dioxide, crystallizes in three different forms, two anhydrates and one monohydrate. Crystal structure analyses of the monohydrate and one of the anhydrate were carried out by Bordner et al. and Kojić-Prodić et al., respectively. In this paper the results of the analysis of the third piroxicam modification and of an independently performed structure determination of the monohydrate are reported. Molecular structures and hydrogen bonding of all modifications are discussed.
authors.affiliation: Zentralinstitut für Molekularbiologie, Akademie der Wissenschaften der DDR, Berlin.
authors.forename: G
authors.initials: G
authors.lastname: Reck
authors.forename: G
authors.initials: G
authors.lastname: Dietz
authors.forename: G
authors.initials: G
authors.lastname: Laban
authors.forename: W
authors.initials: W
authors.lastname: Günther
authors.forename: G
authors.initials: G
authors.lastname: Bannier
authors.forename: E
authors.initials: E
authors.lastname: Höhne
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D003460:Crystallization; D008968:Molecular Conformation; D010894:Piroxicam / Q000032:analysis*; D014961:X-Ray Diffraction
chemical_list: D010894:Piroxicam