Boehringer Ingelheim Pharmaceuticals, Inc.

Boehringer Ingelheim Gmbh

James T Oliver

Karl G Grozinger

Victor Fuchs

Patrick B Stewart

Kurt Freter

Friedrich K Hess

Compounds of the formula ##STR1## wherein R.sub.1 is hydrogen or alkyl of 1 to 4 carbon atoms;

Diazine-ethenylphenyl oxamic acids and esters and salts thereof

Compounds of the formula ##STR1## R.sub.1 is hydrogen or alkyl of 1 to 4 carbon atoms; R.sub.2 is hydrogen, methyl, hydroxyl, alkoxy of 1 to 4 carbon atoms, di(alkyl of 1 to 2 carbon atoms)amino-(alkoxy of 1 to 4 carbon atoms) or NHCOCOOR.sub.1 ;

Diazine-ethyenylphenyl oxamic acids and esters and salts thereof

Compounds of the formula ##STR1## wherein R.sub.1 is hydrogen, halogen or methoxy;

Antiallergic N-[4-(indolyl)-piperidino-alkyl]-benzimidazolones

4-Substituted thiazolyl-2-oxamic acids and salts and esters thereof

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Middlebury, CT, United States of America

James T Oliver