1,2,3-Oxadiazolium, 4-(2-(2-benzoylhydrazino)-4-thiazolyl)-5-hydroxy-3-phenyl-, inner salt 155811-65-7 4-(2-(2-Benzoylhydrazino)-4-thiazolyl)-5-hydroxy-3-phenyl-1,2,3-oxadiazolium inner salt