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phenyl US English

Of or denoting the radical —C6H5, derived from benzene by removal of a hydrogen atom

1-phenyl-2-aminopropane in amphetamine US English

A synthetic, addictive, mood-altering drug, used illegally as a stimulant and legally as a prescription drug to treat children with ADD and adults with narcolepsy

1-phenyl-2-methylaminopropanol in ephedrine US English

A crystalline alkaloid drug obtained from some ephedras. It causes constriction of the blood vessels and widening of the bronchial passages and is used to relieve asthma and hay fever