1,3-Dioxy-2-nicotinsaeureamid-tetrazol [German] 5,7-Dihydroxytetrazolo(1,5-a)pyridine-6-carboxamide Pyridotetrazole-6-carboxamide, 5,7-dihydroxy- Tetrazolo(1,5-a)pyridine-6-carboxamide, 5,7-dihydroxy- XF8238000