Bisfluoran chromogenic compounds, preparation thereof, and press

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

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C07D49322

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active

041103432

ABSTRACT:
A substantially colorless bisfluoran chromogenic material having the structural formula ##STR1## wherein R.sup.1 and R.sup.2 each represent an alkyl group;

REFERENCES:
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patent: 3663571 (1972-05-01), Kimura et al.
patent: 3821010 (1974-06-01), Vincent et al.
patent: 3825561 (1974-07-01), Akamatsu et al.
patent: 3910956 (1975-10-01), Hoover
patent: 4012419 (1977-03-01), Vincent et al.

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