| abstract |
(57) [Abstract] [Problem] General formula (I) (In the formula, R 1 , R 2 and R 3 are the same or different and each represents a hydrogen atom, an R 4 OCO group, an R 4 OCOCH 2 group, a HOCH 2 groups, R 4 COCH 2 group, R 4 CO group or (R 5 ) (R 6 ). Represents an NCO group, or R 1 and R 2 together form CO It represents a —CH 2 group, and R 1 , R 2 and R 3 are not both hydrogen atoms. And an indole derivative having a) and a dyeing agent containing the same. It is used as a dyeing agent having excellent stability and dyeability. |