| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a direct dye for reversibly dyeing a keratin fiber and for simultaneously effecting excellent dyeing characteristics. <P>SOLUTION: Compound are prepared which are selected from among the compounds of leuco type of formula (I), the dyes of azomethine type containing a pyrazolopyridine unit of formula (II) corresponding to the compounds of formula (I), the mesomeric forms, isomeric and tautomeric forms thereof, the acid addition salts thereof, and solvates thereof. <P>COPYRIGHT: (C)2011,JPO&INPIT |
