5-hydroxy-5-methyl-4-bromo-3-n-butyl-2(5H)-furanone

(E)-3-bromo-2-n-butylpropenoic acid

5-methylene-4-bromo-3-n-butyl-2(5H)-furanone

4-Bromo-3-butyl-5-dichloromethylene-5H-furan-2-one

4,5-Dibromo-5-bromomethyl-3-butyl-2(5H)-furanone