(R)-2-hydroxy-3-methylbutanoate + NADP(+) => 3-methyl-2-oxobutanoate + NADPH + H(+)
(r)-2-hydroxy-3-methylbutanoate + nadp(+) => 3-methyl-2-oxobutanoate + nadph + h(+)
(R)-2-hydroxy-3-methylbutanoate + NADP(+) => 3-methyl-2-oxobutanoate + NADPH + H(+)
(r)-2-hydroxy-3-methylbutanoate + nadp(+) => 3-methyl-2-oxobutanoate + nadph + h(+)