preferred_name: androst-4-ene-3,17-dione + A <=> androsta-1,4-diene-3,17-dione + AH2
preferred_name_lc: androst-4-ene-3,17-dione + a <=> androsta-1,4-diene-3,17-dione + ah2
label: androst-4-ene-3,17-dione + A <=> androsta-1,4-diene-3,17-dione + AH2
label_lc: androst-4-ene-3,17-dione + a <=> androsta-1,4-diene-3,17-dione + ah2