Claim 1: Compounds of formula (1) characterized in that, wherein Rᵃ and Rᵇ and Rᶜ independently are H, fluorine, chlorine, bromine, cyano, nitro, unsubstituted or substituted C₁₋₆ alkyl or unsubstituted or substituted C₁₋₆ haloalkyl, unsubstituted or substituted C₁₋₆ alkoxy, unsubstituted or substituted C₁₋₆ haloalkoxy, unsubstituted or substituted C₂₋₆ alkenyl, unsubstituted or substituted C₂₋₆ alkynyl； R is H, unsubstituted or substituted C₁₋₆ alkyl, unsubstituted or substituted C₁₋₆ haloalkyl, unsubstituted or substituted by aryl-A- with five to ten ring members,unsubstituted or substituted heteroaryl with 5 to 7 ring members comprising heteroatoms selected from O, S and N, unsubstituted or substituted C₃₋₆ cycloalkyl, unsubstituted or substituted C₃₋₆ heterocycloalkyl ring members comprising heteroatoms selected from O, S and N , C₂₋₆ alkenyl,1. C 83228331 asphalt；C₍O₎R, C₍O₎OR, S₍O₎ₙR； R is H, unsubstituted or substituted C₁₋₆ alkyl, unsubstituted or substituted C₁₋₆ haloalkyl, unsubstituted or substituted aryl, unsubstituted or substituted heteroaryl； n is an integer from 0 to 2； A is a bridge element that is selected from -Cquile alkylene,-C (O) -alquileno C -C (O) --C (O) -C₁₋₄ alkylene where the alkylene bridges can be unsubstituted or substituted as an alkyl group； or if the OR moiety is in position 6 and the substituent Rᶜ is in position 7, R forms a 5 to 7 member ring with Rᵇ or Rᶜ and said 5 to 7 member ring may contain additional heteroatoms selected from O, S and N； or if the OR moiety is in position 7 and the substituent Rᶜ is in position 6, R forms a 5 to 7 member ring with Rᶜ and said 5 to 7 member ring may contain additional heteroatoms selected from O, S and N ； and if R is methyl at least one of Rᵃ and Rᵇ and Rᶜ is not H；wherein the substituents for the aryl, heteroaryl, are independently selected from the group consisting of halogen, hydroxy, cyano, nitro, C₁₋₆ alkyl,C₁₋₆ haloalkyl,C₁₋₆ alkoxy,C₁₋₆ alkoxy-C₁₋₆ alkyl,C₁₋₆ haloalkoxy,C₁₋₆amino al
