2H-1,2,4-oxadiazin-5(6H)-one, 3-hydroxy- 3-hydroxy-2H-1,2,4-oxadiazin-5(6H)-one InChI=1/C3H4N2O3/c6-2-1-8-5-3(7)4-2/h1H2,(H2,4,5,6,7