butanoyl-CoA + acetyl-CoA <=> 3-oxohexanoyl-CoA + CoA
butanoyl-coa + acetyl-coa <=> 3-oxohexanoyl-coa + coa
butanoyl-CoA + acetyl-CoA <=> 3-oxohexanoyl-CoA + CoA
butanoyl-coa + acetyl-coa <=> 3-oxohexanoyl-coa + coa