| 摘要 |
<p>A compound of formula (1) and salts thereof, wherein: L is optionally substituted piperazinyl; D is optionally substituted phenylene or naphthylene; E is optionally substituted phenylene, naphthylene or quinolinylene; R is H or C1-4-alkyl; n has a value of 0 or 1; and Z is H, alkyl or aryl free from water-solubilising groups. The compound of formula (1) is useful as a black colorant in aqueous ink jet printing inks.</p> |
