Both contain an imidazole ring and a 2,6-dichlorinated phenyl ring.

The addition of a phenyl ring allows phenibut to cross the blood brain barrier.

Methylmethaqualone differs from methaqualone by 4-methylation on the phenyl ring.

Many drugs as well as many pollutants contain phenyl rings.

The molecule consists of a phenyl ring attached to the isocyanate functional group.

Double substitutions of the phenyl rings are known to occur, even with conversions well below 100%.

The sulfonation occurs at one meta-position of each of the three phenyl rings.

The imidazole region: Various substituents have been placed at the para-position of the central phenyl ring.

For such 1,2-disubstituted olefins, regioselectivity can be observed only when one of the two substituents is a phenyl ring.

The point is illustrated by the short 5.4 Å distance between the centers of the corresponding phenyl rings.