The present invention relates to a compound of formula (I-0) or a salt thereof. The invention further relates to the use of such compound as a colouring agent. The invention also relates to a colouring composition comprising such compound.
本发明涉及一种具有
化学式(I-0)的化合物或其盐。该发明进一步涉及将这种化合物用作
着色剂的用途。该发明还涉及包含这种化合物的着色组合物。