(S)-oxalosuccinate + NADPH + H(+) => D-threo-isocitrate + NADP(+)
(s)-oxalosuccinate + nadph + h(+) => d-threo-isocitrate + nadp(+)
(S)-oxalosuccinate + NADPH + H(+) => D-threo-isocitrate + NADP(+)
(s)-oxalosuccinate + nadph + h(+) => d-threo-isocitrate + nadp(+)