| 摘要 |
PROBLEM TO BE SOLVED: To provide a compound for dyestuffs, which has excellent thermal stability.SOLUTION: A compound is shown by formula (I) [wherein Rto Rrepresent each a hydrogen atom or a 1-20C univalent hydrocarbon group independently, Ris bonded to Rto form a ring together with an adjacent carbon atom on a benzene ring and an adjacent nitrogen atom, Ris bonded to Rto form a ring together with an adjacent carbon atom on a benzene ring and an adjacent nitrogen atom, or Ris bonded to Rto form a ring together with an adjacent nitrogen atom; and M represents a hydrogen atom or an alkali metal atom]. |
