| 摘要 |
A coupler having the general formula (I): <IMAGE> (I) in which R is selected from the group consisting of hydrogen, alkyl or hydroxyalkyl having 1 to 3 carbon atoms, and in which Z is selected from the group consisting of hydroxyalkyl, alkoxyalkyl in which the alkoxy group comprises 1 to 2 carbon atoms, mesylaminoalkyl, acetylaminoalkyl, ureidoaminoalkyl or carbethoxyaminoalkyl, the alkyl groups constituting Z comprising from 2 to 3 carbon atoms, or the salts of the corresponding acids.
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