HETEROCYCLIC PIGMENT AND DYE
A compound of formula I in which each R1 independently is selected from oxygen, =NH or =N-R2 where R2 is an aromatic or heteroaromatic group, provided not more than two groups R1 are selected from oxygen and =NH.
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | A compound of formula I in which each R1 independently is selected from oxygen, =NH or =N-R2 where R2 is an aromatic or heteroaromatic group, provided not more than two groups R1 are selected from oxygen and =NH. |
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