1026-36-4Relevant articles and documents
Voltammetry of the pteridine derivative, triamterene
Asahi, Yutaka,Tanaka, Masami,Yamamoto, Naohiro
, p. 1115 - 1118 (1996)
Triamterene, 6-phenyl-2,4,7-triaminopteridine (1), a diuretic, gave two steps of two-electron reduction waves on Tast polarography (TP). The first step was ascribed to the reversible reduction of 1 into unreducible 5,8- dihydrotriamterene (2) by cyclic voltammetry (CV). Tautomerization of 2 to reducible 7,8-dihydrotriamterene (3) was rapid first-order reaction catalyzed by acid and base. The second step was attributed to the irreversible reduction of 3 into 5,6,7,8-tetrahydrotriamterene (4), which was oxidized to 2,4-diamino-6-phenylpteridine at a more positive potential than those of 2 and 3 into 1 on CV. The oxidation of 3 to 1 was observed at a more positive potential than that of 2 to 1 on CV. The anodic wave of 1 on TP in alkaline solution was ascribed to formation of the mercury complex of 1.
Inhibition of neuronal nitric oxide synthase by 4-amino pteridine derivatives: Structure-activity relationship of antagonists of (6R)-5,6,7,8- tetrahydrobiopterin cofactor
Fr?hlich, Lothar G.,Kotsonis, Peter,Traub, Hermann,Taghavi-Moghadam, Shahriyar,Al-Masoudi, Najim,Hofmann, Heinrich,Strobel, Hartmut,Matter, Hans,Pfleiderer, Wolfgang,Schmidt, Harald H. H. W.
, p. 4108 - 4121 (2007/10/03)
The family of nitric oxide synthases (NOS) catalyzes the conversion of L-arginine to L-citrulline and nitric oxide (NO), an important cellular messenger molecule which has been implicated in the pathophysiology of septic shock and inflammatory and neurode