(2S)-ethylmalonyl-CoA + NADP(+) <=> (2E)-butenoyl-CoA + CO2 + NADPH
(2s)-ethylmalonyl-coa + nadp(+) <=> (2e)-butenoyl-coa + co2 + nadph
(2S)-ethylmalonyl-CoA + NADP(+) <=> (2E)-butenoyl-CoA + CO2 + NADPH
(2s)-ethylmalonyl-coa + nadp(+) <=> (2e)-butenoyl-coa + co2 + nadph