CHs H HC-CH Br 0 H C=CH2 C=C HgC C-OH H2C=C H C=C H C CH3 H H CH2OH (E)-3-Methyl-1,3-pentadiene (E)-1-Bromo-2-isopropyl- (Z)-2-Hydroxymethyl- 1.3-butadiene 2-butenoic acid C2004 Thomson-Brooks/Cole