oxalate(out) + 2 hydrogencarbonate(in) => oxalate(in) + 2 hydrogencarbonate(out)
oxalate(out) + 2 hydrogencarbonate(in) => oxalate(in) + 2 hydrogencarbonate(out)
oxalate(out) + 2 hydrogencarbonate(in) => oxalate(in) + 2 hydrogencarbonate(out)
oxalate(out) + 2 hydrogencarbonate(in) => oxalate(in) + 2 hydrogencarbonate(out)