Imidazole derivatives

An imidazole derivative having the formula ##STR9## wherein each of R.sup.1 and R.sup.2 independently is hydrogen, an alkyl group having 1-8 carbon atoms, a cycloalkyl group having 5-8 carbon atoms, an aryl group, an aralkyl group having 1-4 carbon atoms in its alkyl chain, or a halogen atom-substituted alkyl group having 1-8 carbon atoms;

• each of R.sup.3, R.sup.4, R.sup.5 and R.sup.6 independently is hydrogen, a halogen atom, an alkoxy group having 1-6 carbon atoms, an aralkyloxy group having 1-4 carbon atoms in its alkyl chain, an alkyl group having 1-6 carbon atoms, an alkoxycarbonyl group having 2-7 carbon atoms, nitro, amino, an acyl having 1-6 carbon atoms, a fluorine substituted alkyl group having 1-6 carbon atoms, or a fluorine substituted alkoxy group having 1-6 carbon atoms;
• R.sup.8 and R.sup.9 are combined to form, together with two carbon atoms of the imidazole ring to which R.sup.8 and R.sup.9 is attached, a 5-8 membered alicyclic ring;
• R.sup.7 is hydrogen, an alkyl group having 1-6 carbon atoms which may have at least one substituent selected from the group consisting of an aryl group, hydroxyl, an alkoxy group having 1-6 carbon atoms, and a halogen atom, an aryl group which may have at least one substituent selected from the group consisting of an alkyl group having 1-6 carbon atoms, an alkoxy group having 1-6 carbon atoms, and a halogen atom, an arylcarbonyl group which may have at least one substituent selected from the group consisting of an alkyl group having 1-6 carbon atoms, an alkoxy group having 1-6 carbon atoms, and a halogen atom;
• and
• n is 0 or 1.