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US 3,939,173 AGranted
Substituted carbonyl compounds
AssigneeBurroughs Wellcome Co.
InventorsHarold Francis Hodson, John Frederick Batchelor
Life of this patent
Estimating the term…
Abstract
Fluorenone and anthraquinone compounds substituted by at at least one tetrazolyl group in one ring, and further substituted in the other ring, optionally for the fluorenones, have antiallergic activity.
Claims9
2,7-Di-(5-tetrazolyl) fluorenone or a pharmaceutically acceptable salt thereof.
2,7-Di-(5-tetrazolyl)fluorenone.
A compound of the formula ##SPC7##
- wherein Z.sup.1 and Z.sup.2 are each a 5(1-R) tetrazolyl or a 5-(2-R)tetrazolyl in which R is hydrogen or alkyl having 1 to 6 carbon atoms or a pharmaceutically acceptable salt of said compound.
Dependencies are inferred from the claim text.