Chromogenic enamine compounds, their preparation and use as colo

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

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548409, 546 15, 546 18, C07D20904

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active

051304422

ABSTRACT:
Compounds of the formula ##STR1## in which R.sup.1 /R.sup.2 are alkyl, cycloalkyl, aralkyl or alkylene,

REFERENCES:
patent: 3872023 (1975-03-01), Baum et al.
patent: 4153609 (1979-05-01), Petitpierre et al.
patent: 4238562 (1980-12-01), Ishida et al.
patent: 4252975 (1981-02-01), Petitpierre et al.
patent: 4295663 (1981-10-01), Petitpierre et al.
Chemical Abstracts, vol. 82, No. 4, Jan. 27, 1975, Abstract No. 18620E, p. 111.

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