preferred_name: n a quinone + n hydrogen sulfide + n H(+) <=> polysulfur(n-2) + n a quinol
preferred_name_lc: n a quinone + n hydrogen sulfide + n h(+) <=> polysulfur(n-2) + n a quinol
label: n a quinone + n hydrogen sulfide + n H(+) <=> polysulfur(n-2) + n a quinol
label_lc: n a quinone + n hydrogen sulfide + n h(+) <=> polysulfur(n-2) + n a quinol