| 摘要 |
The present invention is concerned with novel compounds useful as photographic silver halide complexing agents and with their photographic use. The subject compounds are represented by the formulas <IMAGE> wherein one of R1 and R2 is -CH2)xSR3 and the other of said R1 and R2 is -CH2)ySR3 wherein R3 is alkyl, x is a whole number 0 or 1 and y is a whole number from 0 to 5.
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