Patent · US Expired

4,9-Dihydro-9-oxo-N-1H-tetrazol-5-yl-pyrazolo[5,1-b]-quinazolin e-2-carboxamides and antiallergic compositions and methods using them

US4247555A · kind A · utility

5Cited by
7References
12Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJan 11, 1980
Grant dateJan 27, 1981
Priority date—
Expiry dateJan 11, 2000

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07D333/24
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

Abstract

Certain 4,9-dihydro-9-oxo-N-1H-tetrazol-5-yl-pyrazolo[5,1-b]quinazoline-2-carboxam ides are disclosed. These compounds prevent the allergic response in mammals.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.