Compounds of formula characterized in that R 0 signifies a substituted C 1 to C 4 alkyl group or an unsubstituted C 1 to C 4 alkyl group, R 1 signifies H, N(R 7' R 7"), a substituted C 1 to C 4 alkyl group or an unsubstituted C 1 to C 4 alkyl group or CN, R 2 or R 2' signify H, a substituted C 1 to C 4 alkyl group or an unsubstituted C 1 to C 4 alkyl group, or a group with the formula -[(CR 8 R 8')-(CR 9 R 9') m -(CR 10 R 10') n -(CR 11 R 11') O]-NR 12 R 12' where m, n and o have the meaning of 1 or 0, and R 8, R 8', R 9, R 9', R 10,R 10', R 11 or R 11' signify independently H, a substituted C 1 to C 4 alkyl group or an unsubstituted C 1 to C 4 alkyl group; and R 12 or R 12' signify independently H, a substituted C 1 to C 4 alkyl group or an unsubstituted C 1 to C 4 alkyl group, R 3 signifies H, a substituted C 1 to C 4 alkyl group or an unsubstituted C 1 to C 4 alkyl group, a substituted C 1 to C 4 alkoxy group or an unsubstituted C 1 to C 4 alkoxy group, R 4 signifies H, a substituted C 1 to C 4 alkyl group or an unsubstituted C 1 to C 4 alkyl group, a substituted C 1 to C 4 alkoxy group or an unsubstituted C 1 to C 4 alkoxy group, R 5 signifies H, substituted C 1 to C 9 alkyl group or an unsubstituted C 1 to C 9 alkyl group, R 6 signifies a substituted C 1 to C 9 alkyl group or an unsubstituted C 1 to C 9 alkyl group, an unsubstituted aryl group or a substituted aryl group, wherein the sum of carbon atoms of R 5 and R 6 is at least 4 carbon atoms, R 7' or R 7" signify independently a substituted C 1 to C 4 alkyl group or an unsubstituted C 1 to C 4 alkyl group, or R 7' and R 7" form together with the nitrogen atom a five or six membered aromatic or a five or six membered cyclo aliphatic ring, wherein the five or six membered ring is substituted by a C 1 to C 4 alkyl group or the five or six membered ring is not further substituted. R 0 signifies a substituted C 1 to C 4 alkyl group or an unsubstituted C 1 to C 4 alkyl group, R 1 signifies H, N(R 7' R 7"), a substituted C 1 to C 4 alkyl group or an unsubstituted C 1 to C 4 alkyl group or CN, R 2 or R 2' signify H, a substituted C 1 to C 4 alkyl group or an unsubstituted C 1 to C 4 alkyl group, or a group with the formula -[(CR 8 R 8')-(CR 9 R 9') m -(CR 10 R 10') n -(CR 11 R 11') O]-NR 12 R 12' where m, n and o have the meaning of 1 or 0, and R 8, R 8', R 9, R 9', R 10,R 10', R 11 or R 11' signify independently H, a substituted C 1 to C 4 alkyl group or an unsubstituted C 1 to C 4 alkyl group; and R 12 or R 12' signify independently H, a substituted C 1 to C 4 alkyl group or an unsubstituted C 1 to C 4 alkyl group, R 3 signifies H, a substituted C 1 to C 4 alkyl group or an unsubstituted C 1 to C 4 alkyl group, a substituted C 1 to C 4 alkoxy group or an unsubstituted C 1 to C 4 alkoxy group, R 4 signifies H, a substituted C 1 to C 4 alkyl group or an unsubstituted C 1 to C 4 alkyl group, a substituted C 1 to C 4 alkoxy group or an unsubstituted C 1 to C 4 alkoxy group, R 5 signifies H, substituted C 1 to C 9 alkyl group or an unsubstituted C 1 to C 9 alkyl group, R 6 signifies a substituted C 1 to C 9 alkyl group or an unsubstituted C 1 to C 9 alkyl group, an unsubstituted aryl group or a substituted aryl group, wherein the sum of carbon atoms of R 5 and R 6 is at least 4 carbon atoms, R 7' or R 7" signify independently a substituted C 1 to C 4 alkyl group or an unsubstituted C 1 to C 4 alkyl group, or R 7' and R 7" form together with the nitrogen atom a five or six membered aromatic or a five or six membered cyclo aliphatic ring, wherein the five or six membered ring is substituted by a C 1 to C 4 alkyl group or the five or six membered ring is not further substituted.