preferred_name: L-homocysteine + H(+) => L-homocysteine thiolactone + H2O
preferred_name_lc: l-homocysteine + h(+) => l-homocysteine thiolactone + h2o
label: L-homocysteine + H(+) => L-homocysteine thiolactone + H2O
label_lc: l-homocysteine + h(+) => l-homocysteine thiolactone + h2o