Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1989-09-28
1992-06-02
Springer, David B.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
548327, 548336, 548374, 548379, 548210, 544 32, 544 3, 544143, C07D40106, C07D41714, C07D40114
Patent
active
051188147
ABSTRACT:
Tetraindolyl-heptamethine derivatives of the isomeric formulae ##STR1## in which A, B, D and E denote ##STR2## and may be identical to or different from one another, and the other symbols have the meaning indicated in the description, are used in pressure-sensitive and heat-sensitive recording materials.
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Berneth Horst
Klug Gunter
Psaar Hubertus
Bayer Aktiengesellschaft
Springer David B.
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