| abstract |
Anti-allergic agents of N-aromatic 1H-(or 2H) tetrazole-5-carboxamide derivation present the following formulae: <IMAGE> +TR <IMAGE> in which R1 is -CN or -CONH2; R2 is hydrogen, lower alkyl, lower alkoxy, halo, polyhalo(lower)alkyl, lower alkyl carbonyl or carb(lower)alkoxy; X is <IMAGE> where R3 is lower alkyl and R4 is hydrogen or lower alkyl; or a pharmaceutically acceptable salt thereof. |