Pyridotriazoloquinazolines and triazolopyridoquinazolines useful as antiallergics

摘要

Compounds of the formula ##STR1## wherein (a)PP R.sub.1 is hydrogen, lower alkyl, lower alkoxy or 8-halo;P PR.sub. 2 is hydrogen, lower alkyl, lower alkoxy or a fused benzene ring; and PPR.sub.3 and R.sub.4, together with each other, are --N N--NH--; orPP(b)PPR.sub.1 and R.sub.2, together with each other, are --NN--NH--;P PR.sub.3 is hydrogen, lower alkyl, lower alkoxy, 2-halo, 3-halo or 4- halo; and PPR.sub.4 is hydrogen, lower alkyl, lower alkoxy or a fused benzene ring;PPand non-toxic, pharmacologically acceptable salts thereof formed with an inorganic or organic base. The compounds as well as their salts are useful as antiallergics.