preferred_name: 2 5-aminolevulinate <=> porphobilinogen + 2 H2O + H(+)
preferred_name_lc: 2 5-aminolevulinate <=> porphobilinogen + 2 h2o + h(+)
label: 2 5-aminolevulinate <=> porphobilinogen + 2 H2O + H(+)
label_lc: 2 5-aminolevulinate <=> porphobilinogen + 2 h2o + h(+)