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