Atenolol belongs to a class of drugs known as beta blockers. It works by blocking the action of certain natural chemicals in your body, such as epinephrine, on the heart and blood vessels. This effect lowers the heart rate, blood pressure, and strain on the heart.
Brompheniramine (Bromfed, Dimetapp, Bromfenex, Dimetane, BPN, Lodrane), commonly marketed as its salt brompheniramine maleate, is an antihistamine drug of the propylamine (alkylamine) class.rompheniramine, 3-(p-bromophenyl)-3-(2-pyridyl)propyldimethylamine, is an analog of chlorpheniramine. The only difference is that the chlorine atom in the benzene ring is replaced with a bromine atom. It is also synthesized in an analogous manner.
Isomers. Pentane is one of three structural isomers with the molecular formula C5H12, the others being isopentane and neopentane.The branched isomers are more stable than pentane, which means that they have lower heat of formation and heat of combustion.sopentane is more stable than pentane by 1.8 kcal/mol, and neopentane by 5 kcal/mol. A related cycloalkane is cyclopentane, although this is not an isomer of pentane as its molecular formula is different, cyclopentane is an isomer of the pentenes.