“Diaminodurol, ascorbic acid and potassium sulphite decreased, but quercetin increased, the spasmolytic activity of isosorbide-5-mononitrate.”
“The development of in vitro tolerance in the rabbit aorta to isosorbide-5-mononitrate (CAS 87-33-2) was potently inhibited by five structurally unrelated antioxidants--diaminodurol, ascorbic acid, potassium sulphite, pyrogallol and quercetin.”