preferred_name: pheophorbide a + Mg(2+) => chlorophyllide a + 2 H(+)
preferred_name_lc: pheophorbide a + mg(2+) => chlorophyllide a + 2 h(+)
label: pheophorbide a + Mg(2+) => chlorophyllide a + 2 H(+)
label_lc: pheophorbide a + mg(2+) => chlorophyllide a + 2 h(+)