Bisfluoran chromogenic compounds, preparation thereof, and press

Details Bisfluoran chromogenic compounds, preparation thereof, and press Bisfluoran chromogenic compounds, preparation thereof, and press

1974-01-02

1977-03-15

Milestone, Norma S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

428914, C07D51900

Patent

active

040124193

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:
patent: 3663571 (1972-05-01), Kimura et al.
Chemical Abstracts, vol. 77 (1972) 63346c, abstract of Ger. Offen., 2,150,666, Apr. 13, 1972.

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