Chromene dyes

Details Chromene dyes Chromene dyes

1996-09-16

1998-02-10

Ramsuer, Robert W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

544300, 548217, 549372, 549407, C07D31158, C07D40506

Patent

active

057171068

ABSTRACT:
A yellow dye having the formula: ##STR1## wherein: R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each independently represents hydrogen, halogen, or an alkoxy group of from 1 to about 6 carbon atoms; and

REFERENCES:
patent: 3796727 (1974-03-01), DeBoer
D. Dauzonne, et al. in Eur. J. Med. Chem. 30(1), 53 (1995).

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