pyropheophorbide a + CO2 => C-13(2)-carboxypyropheophorbide a + H(+)
pyropheophorbide a + co2 => c-13(2)-carboxypyropheophorbide a + h(+)
pyropheophorbide a + CO2 => C-13(2)-carboxypyropheophorbide a + H(+)
pyropheophorbide a + co2 => c-13(2)-carboxypyropheophorbide a + h(+)