Oxazole derivatives

A compound of the formula

• wherein
• R1 is aryl or heteroaryl;
• R2, R3, R4 and R6 are independently selected from the group consisting of hydrogen, hydroxy, lower-alkenyl, halogen, lower-alkyl and lower-alkoxy, wherein at least one of R2, R3, R4 and R6 is not hydrogen, or
• R2 and R6 are independently selected from the group consisting of hydrogen, hydroxy, lower-alkenyl, halogen, lower-alkyl and lower-alkoxy, and R3 and R4 are bonded to each other to form a ring together with the carbon atoms to which they are attached, and R3 and R4 together are —CH═CH—S—, —S—CH═CH—, —CH═CH—O—, —O—CH═CH—, —CH═CH—, —CH═CH—, —(CH2)3-5—, —O—(CH2)2-3— or —(CH2)2-3—O—;
• R5 is lower-alkoxy or lower-alkenyloxy;
• R7 is hydrogen or lower-alkyl;
• n is 1, 2 or 3;
• wherein the bond between the carbon atom Ca and the carbon atom Cb is a carbon carbon single or double bond;
• and pharmaceutically acceptable salts and esters thereof.