1,1'-Methanediylbis(3-hydroxypyridinium) salt with 2,4,6-trinitrophenol (1:2) N,N'-Methylenebis(3-oxypyridyl) betaine dipicrate Pyridinium, 1,1'-methanediylbis(3-hydroxy-, salt with 2,4,6-trinitrophenol (1:2) UU5792100