Patent ID: 7871446

Claim:
A dyestuff of the formula (I) wherein D is of the formula (IIa) wherein G 1 is hydrogen, halogen, cyano or nitro; G 2 is hydrogen, halogen or nitro; G 3 is hydrogen, halogen, methylsulfonyl, fluorosulfonyl or nitro; and G 4 is hydrogen, halogen, trifluoromethyl, cyano or nitro; or of the formula (IIb) wherein G 5 is hydrogen or halogen; and G 6 is hydrogen, halogen, nitro, —SO 2 CH 3 or —SCN; or of the formula (IIc) wherein G 7 is hydrogen or halogen, or of the formula (IId) wherein G 8 is nitro, cyano, —CHO or a group of the formula (IIe) wherein G 11 and G 12 are independently hydrogen, halogen, nitro or cyano; G 9 is hydrogen or halogen; and G 10 is nitro, cyano, —COCH 3 or —COO—G 13 , wherein G 13 is C 1 -C 4 alkyl; or of the fomula (IIf); R 1 is hydrogen, (C 1 -C 4 )-alkyl, hydroxy, —NHCOR 6 or —NHSO 2 R 6 ; R 2 is hydrogen, halogen or (C 1 -C 4 )-alkoxy; R 3 is hydrogen or methyl; R 4 is hydrogen, (C 1 -C 6 )-alkyl, substituted (C 1 -C 6 )-alkyl, (C 2 -C 6 )-alkyl, which is interrupted by 1, 2 or 3 heteroatoms wherein said heteroatoms are —O—, —S— or —NR 7 , substituted (C 2 -C 6 )-alkyl, which is interrupted by 1, 2 or 3 heteroatoms wherein said heteroatoms are —O—, —S— or —NR 7 , (C 2 -C 6 )-alkenyl, substituted (C 2 -C 6 )-alkenyl, benzyl or phenethyl; R 5 is hydrogen or methyl; R 6 is (C 1 -C 4 )-alkyl, phenyl or substituted phenyl; R 7 is (C 1 -C 4 )-alkyl, phenyl or substituted phenyl; m is 0, 1 or 2; and n is 0 or 1 with a proviso that when D represents formula (IIa), m is 0.