Organic compounds -- part of the class 532-570 series – Organic compounds – Chalcogen in the nitrogen containing substituent
Patent
1984-06-22
1985-11-26
Ramsuer, Robert W.
Organic compounds -- part of the class 532-570 series
Organic compounds
Chalcogen in the nitrogen containing substituent
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
Fletcher Ian J.
Zink Rudolf
Ciba-Geigy Corporation
Fishman Irving M.
Mansfield Kevin T.
McC. Roberts Edward
Ramsuer Robert W.
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