doxazosin

noun

dox·​a·​zo·​sin ˌdäk-ˈsā-zō-sin 

: a drug taken orally in the form of its mesylate C₂₃H₂₅N₅O₅·CH₄O₃S to relieve urethral obstruction in benign prostatic hyperplasia and to treat hypertension

Note: Doxazosin is a derivative of quinazoline that acts to relax smooth muscle by combining with and blocking the activity of an alpha-receptor. It is marketed under the trademark Cardura.