(2R)-ethylmalonyl-CoA + H(+) => butanoyl-CoA + CO2
(2r)-ethylmalonyl-coa + h(+) => butanoyl-coa + co2
(2R)-ethylmalonyl-CoA + H(+) => butanoyl-CoA + CO2
(2r)-ethylmalonyl-coa + h(+) => butanoyl-coa + co2