(2R)-2-hydroxy-3-(4-hydroxyphenyl)propanoate + NADP(+) => 3-(4-hydroxyphenyl)pyruvate + NADPH + H(+)
(2r)-2-hydroxy-3-(4-hydroxyphenyl)propanoate + nadp(+) => 3-(4-hydroxyphenyl)pyruvate + nadph + h(+)