3428-05-5 4-Pyridinecarboxylic acid, (1-carboxyethylidene)hydrazine, calcium salt (2:1) Isoniazid calcium pyruvate Isonicotinic acid, (1-carboxyethylidene)hydrazide, calcium salt (2:1) Pyruvic acid calcium isoniazid Pyruvic acid calcium isoniazid [JAN] Pyruvic acid calcium isoniazid heptahydrate Pyruvic acid calcium isoniazone