Aryl fluoroethyl ureas acting as alpha 2 adrenergic agents

A compound having the structure:

• or a pharmaceutically acceptable salt thereof wherein:
• R1 is H, alkyl, phenyl, or substituted phenyl;
• n is 0 or 1;
• Z1-Z6 are each independently C, CH, N, O, or S;
• p is 0 or 1;
• m is 1 to 5;
• each R2 is independently lower alkyl, halide, trifluoromethyl, lower alkenyl, lower alkynyl, cycloalkyl, —CN, —CH2CN, —CH2SR3, —CH2N(R3)2, —CH2OR3, —OR3, —SR3, —C(O)R4;
• wherein two R2 moieties taken together with carbon atoms to which each R2 is attached may form an aryl, substituted aryl, heteroaryl, substituted heteroaryl, cycloalkyl, substituted cycloalkyl, heterocyclic, or substituted heterocyclic ring;
• each R3 is independently H, lower alkyl, or cycloalkyl;
• and
• each R4 is independently H, lower alkyl, cycloalkyl, alkoxy, phenyl, substituted phenyl, heteroaryl, substituted heteroaryl, or trifluoromethyl.