Chromogenic quinazolines

Organic compounds -- part of the class 532-570 series – Organic compounds – Chalcogen in the nitrogen containing substituent

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Details

544 6, 544 62, 544 70, 544116, 544119, 544230, 544284, 427151, C07D40302, C07D41302

Patent

active

045555699

ABSTRACT:
The invention relates to chromogenic quinazolines of the formula ##STR1## wherein Y is a polycyclic non-aromatic heterocyclic radical which is attached to the quinazoline moiety through a fused benzene nucleus and is unsubstituted or substituted, and

REFERENCES:
patent: 4435003 (1984-03-01), Fletcher

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