2H-Isoxazolo(2,3-a)-1,3,5-triazine-2,4(3H)-dione, 7-(1,1-dimethylethyl)-3-methyl- 7-(1,1-Dimethylethyl)-3-methyl-2H-isoxazolo(2,3-a)-1,3,5-triazine-2,4(3H)-dione 95971-56-5