Ciba Specialty Chemicals Corporation

Sonia Megert

Kazuhiko Kunimoto

Adalbert Braig

Hiroshi Yamamoto

Junji Otani

Kunihiko Kodama

Patrick Verhoustraeten

Georges Metzger

Christophe Bulliard

The present invention is directed to maleimides and preparation of compounds of the formula Iwherein

Fluorescent maleimides and uses thereof

A process for removing stain in a photographic material is described which process comprises incorporation of at least one compound of the formula (I)wherein

Process for removing stain in a photographic material

A process for removing stain in a photographic material is described which process comprises incorporation of at least one compound of formula (I) wherein X is O or NH; n is 1 or 2, p is 0, 1 or 2, M is hydrogen, an alkali metal atom, ammonium or a cation formed from an amine; each R , independently, is an amimoacid residue from which a hydrogen atom on the amino group has been removed; each R , independendy, is hydrogen, C -C alkyl, C -C alkoxy, halogen, cyano, COOR, wherein R is hydrogen or C -C alky1, CONH&mdash;R in which R has its previous significance, SO NH&mdash;R in which R has its previous significance, NH&mdash;COR in which R has its previous significance, or SO M, wherein M has its previous significance, or, if n is 1, R can also be CO&mdash;R in which R is C -C alkyl or phenyl, in that photographic material.

Process for the removing stain in a photographic material

The present invention relates to compounds of formula I

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Ueken, Switzerland

Sonia Megert