2-Bromo-1-butene23074-36-445 % similar Methallyl bromide1458-98-638 % similar 1,4-Dibromo-2,3-bis(bromomethyl)-2-butene30432-16-735 % similar Bromoacetyl bromide598-21-033 % similar 2-(Bromomethyl)acrylic acid72707-66-531 % similar 1,4-Dibromo-2,3-butanedione6305-43-730 % similar 1,3-Dibromo-2-propanone816-39-730 % similar