135420-39-2 2H-1,4-Benzoxazin-3(4H)-one, 7-(2-((ethylthio)methyl)-1-oxobutyl)-4-methyl- 7-(2-((Ethylthio)methyl)-1-oxobutyl)-4-methyl-2H-1,4-benzoxazin-3(4H)-one BRN 4325341