21. It is benzoylurea derivative substituted with phenyl group on the opposite nitrogen atom. 22. They tried drugs like phenyl barbital and Dilantin. 23. The three phenyl groups also offer steric protection. 24. The replacement of the phenyl sulfones with heteroaryl sulfones greatly alters the reaction pathway. 25. The compound adopts a polymeric structure with bonds between the phenyl rings and potassium. 26. Another change is the replacement of the 5-phenyl chlorine substituent by bromine. 27. Two hydroxyl groups on the ancillary phenyl ring are also required for inhibitory potency. 28. It consists of a tertiary amine, featuring dimethylamino group attached to a phenyl group. 29. The migratory ability is ranked tertiary { " secondary { " phenyl { " primary. 30. "' Phenylacetylene "'is an alkyne hydrocarbon containing a phenyl group.
