3-hydroxyindolin-2-one + NADP(+) => isatin + NADPH + H(+)
3-hydroxyindolin-2-one + nadp(+) => isatin + nadph + h(+)
3-hydroxyindolin-2-one + NADP(+) => isatin + NADPH + H(+)
3-hydroxyindolin-2-one + nadp(+) => isatin + nadph + h(+)