These groups can range from methyl, ethyl, propyl, octyl, or phenyl groups. The molecule consists of a propyl group attached to a phenyl ring. It is a hydroxy ketone attached to two phenyl groups. Most common derivatives have different substituents on the phenyl groups. Benzyl is not to be confused with phenyl with the formula CH. The biphenyl molecule consists of two connected phenyl rings. As an example, consider a hydroxyl group connected to a phenyl group. Addition of phenyl cyclopropylamine substituent in the 5 position gave high affinities. It consists of a tertiary amine, featuring dimethylamino group attached to a phenyl group. In addition to the ordinary thermal phenyl ester reaction a photochemical variant is possible. He prepared it by reduction of a phenyl diazonium salt using sulfite salts. The name 'phenanthrene' is a composite of phenyl and anthracene. PPh is pyramidal with a chiral propeller-like arrangement of the three phenyl rings. It can be prepared by the heating of phenyl salicylate. Natural amygdalin has the ("R")-configuration at the chiral phenyl center.