preferred_name: L-homocysteine = 2-aminobut-2-enoate + hydrogen sulfide + H(+)
preferred_name_lc: l-homocysteine = 2-aminobut-2-enoate + hydrogen sulfide + h(+)
label: L-homocysteine = 2-aminobut-2-enoate + hydrogen sulfide + H(+)
label_lc: l-homocysteine = 2-aminobut-2-enoate + hydrogen sulfide + h(+)