Urazole3232-84-6100 % similar 3-Chloromethyl-1,2,4-triazolin-5-one252742-72-644 % similar Uric acid69-93-232 % similar Melamine cyanurate37640-57-631 % similar Ammelide645-93-231 % similar 2,4-Dihydro-3H-1,2,4-triazol-3-one930-33-631 % similar