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