The absolute stereochemical configuration of (-)-5-methylheptan-3-one is R. Determine which of the following structures are valid representations of (-)-5-methylheptan-3-one. Check all that apply. CH₂CH3 □H₂CCH₂COCH₂CH₂ U H₂C- H CH₂CH3 H -CH₂COCH₂CH₂ None of the above X

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