135420-37-0 2H-1,4-Benzoxazin-3(4H)-one, 4-hexyl-2-methyl-7-(2-methylene-1-oxobutyl)- 4-Hexyl-2-methyl-7-(2-methylene-1-oxobutyl)-2H-1,4-benzoxazin-3(4H)-one BRN 4330869