| abstract |
(57) [abstract] (with revision) [Problem] Fluorescent whitening agent (FWA) New stilbene compounds useful as agents). A compound of the following formula (1): [Wherein M is a cation formed from hydrogen, an alkali metal atom, ammonium or an amine, and R 1 is a group represented by the following formula: R 2 represents NH 2 , N (CH 2 CH 2 OH) 2 , R 3 represents NR 4 R 5 or the like, and R 4 and R 5 represent hydrogen, alkyl or the like] |