H3C-CH2CH2CH23-COONa -> H3C-CH2-CH2-CH3 -> H3C-CHBr-CH2-CH3 -> H3C-CH2-CHCH3CH3CH3-CHCH3CH3CH3-CH3 -> H3C-CHHH=CH-CH3
H3C-CH2CH2CH23-COONa -> H3C-CH2-CH2-CH3 -> H3C-CHBr-CH2-CH3 -> H3C-CH2-CHCH3CH3CH3-CHCH3CH3CH3-CH3 -> H3C-CHHH=CH-CH3