| 摘要 |
The sulfonamide derivative according to the present invention is expressed by a general formula: <IMAGE> (where R represents an alkyl group. -X represents -L12-COOM or <IMAGE> and Y- represents R-SO2NH-L11- or MOOC-L12-. Each of L11 and L12 represents an alkylene group. Z is identical to Y, and M represents a hydrogen atom or a cation. However, X and Y cannot be -L12-COOM at the same time. W represents an alkylene group or a cycloalkylene group having 2 or more carbon atoms.) This compound is useful as a metallic ion shielding agent and is suitable, for example, for the applications such as photographic processing solution, chelate titration or analytical reagent for medical treatment or for medical drugs as a metallic ion shielding agent.
|
