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3(R),4R)3-Bromo-3,4- dimethylhexane CH2CH3 Br CH3 NaOCH3 H CH3 in CH3OH heat CH2CH33(R),4(R) 3-Bromo-3,4- dimethylhexane CH2 CH3 CH2 CH3 Br CH3 H CH3 NaOCH3 in CH3 OH heat
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