申请人:Ciba-Geigy Corporation
公开号:US05145766A1
公开(公告)日:1992-09-08
Compounds of the formula ##STR1## in which R is hydrogen or hydroxyl, R.sub.1 is alkyl, alkoxy, amino or aryl, and R.sub.2 is hydrocarbylcarbonyl or hydrocarbylsulfonyl, are highly suitable for stabilizing magenta couplers in photographic materials.
式子为##STR1##的化合物,其中R是氢或羟基,R.sub.1是烷基、烷氧基、氨基或芳基,R.sub.2是烃基羰基或烃基磺酰基,非常适合用于稳定照相材料中的洋红色偶合剂。