(S)-3-methyl-2-oxopentanoate + NAD(+) + CoA = 2-methylbutanoyl-CoA + CO2 + NADH
(s)-3-methyl-2-oxopentanoate + nad(+) + coa = 2-methylbutanoyl-coa + co2 + nadh
(S)-3-methyl-2-oxopentanoate + NAD(+) + CoA = 2-methylbutanoyl-CoA + CO2 + NADH
(s)-3-methyl-2-oxopentanoate + nad(+) + coa = 2-methylbutanoyl-coa + co2 + nadh