Dihydroalprenolol is a beta-blocker medication used to treat high blood pressure and heart conditions. It has several synonyms that refer to the chemical composition of the drug, including 4-Hydroxy-3-(isopropylamino)phenyl-isopropylamine, 1-(4-Hydroxy-3-(isopropylamino)phenyl)isopropanolamine, and 3-(Isopropylamino)-4-(2-hydroxy-3-isopropylaminopropoxy)phenol. These names are derived from the structure of the compound, which has a phenyl ring with a hydroxyl group at the 4-position and an isopropylamino group attached to the 3-position.