title: Quantitative structure-activity relationships of Ca(2+)-antagonistic semotiadil congeners.
abstract: Structure-Ca2+ antagonistic activity relationships of semotiadil (1) congeners having a benzothiazine cyclic system were studied quantitatively by the Hansch-Fujita method. A quadratic dependency of the activity on ClogP, a lipophilic descriptor, of terminal arylalkylamine moieties was suggested. A correlation between the dipole moment component of the 5'-substituted 2-phenylbenzothiazine parts and the potency was also suggested. Additionally, quantitative analysis was successfully shown for the 2-substituted 1 congeners. The results gave information about the mode of binding of 1 with Ca2+ receptor.
authors.affiliation: Developmental Research Laboratories, Santen Pharmaceutical Co., Ltd., Osaka, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Fujimura
authors.forename: A
authors.initials: A
authors.lastname: Ota
authors.forename: Y
authors.initials: Y
authors.lastname: Kawashima
mesh_terms: D000818:Animals; D002121:Calcium Channel Blockers / Q000737:chemistry / Q000494:pharmacology*; D006168:Guinea Pigs; D066298:In Vitro Techniques; D008968:Molecular Conformation; D013329:Structure-Activity Relationship; D013844:Thiazoles / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D002121:Calcium Channel Blockers; D013844:Thiazoles; C064356:sesamodil