butanoyl-CoA + NAD(+) <=> (2E)-butenoyl-CoA + NADH + H(+)
butanoyl-coa + nad(+) <=> (2e)-butenoyl-coa + nadh + h(+)
butanoyl-CoA + NAD(+) <=> (2E)-butenoyl-CoA + NADH + H(+)
butanoyl-coa + nad(+) <=> (2e)-butenoyl-coa + nadh + h(+)