6-pyruvoyl-5,6,7,8-tetrahydropterin + NADPH + H(+) => 6-lactoyl-5,6,7,8-tetrahydropterin + NADP(+)
6-pyruvoyl-5,6,7,8-tetrahydropterin + nadph + h(+) => 6-lactoyl-5,6,7,8-tetrahydropterin + nadp(+)
6-pyruvoyl-5,6,7,8-tetrahydropterin + NADPH + H(+) => 6-lactoyl-5,6,7,8-tetrahydropterin + NADP(+)
6-pyruvoyl-5,6,7,8-tetrahydropterin + nadph + h(+) => 6-lactoyl-5,6,7,8-tetrahydropterin + nadp(+)