2-butenoic acid, 4-(2-bromo-1-oxopropoxy)-, methyl ester, (2E)- InChI=1/C8H11BrO4/c1-6(9)8(11)13-5-3-4-7(10)12-2/h3-4,6H,5H2,1-2H3/b4-3 methyl (2E)-4-[(2-bromopropanoyl)oxy]but-2-enoate