135420-30-3 2H-1,4-Benzoxazin-3(4H)-one, 4-methyl-7-(2-methylene-1-oxobutyl)-2-propyl- 4-Methyl-7-(2-methylene-1-oxobutyl)-2-propyl-2H-1,4-benzoxazin-3(4H)-one BRN 4325653