| 摘要 |
Dyes of the formula: (I) <IMAGE> in which Z is unsubstituted or substituted alkyl, alkenyl, cycloalkyl, aralkyl, aryl or heteroaryl or a radical of the formula <IMAGE> Z1, Z2, Z3 and Z4 are hydrogen or unsubstituted or substituted alkyl, cycloalkyl, aralkyl or aryl; Z1 and Z2 or Z3 and Z4 may together with the nitrogen form a heterocyclic ring; Z1 and Z2 together with the nitrogen may be a saturated unsubstituted or substituted 5-membered or 6-membered ring condensed on in the ortho-position to the nitrogen; B is unsubstituted or substituted alkyl, alkenyl, cycloalkyl, aralkyl, aryl or heteroaryl; and X is imino or oxygen.
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