preferred_name: (3Z)-2-oxo-4-carboxy-3-hexenedioate => (1E)-4-oxobut-1-ene-1,2,4-tricarboxylate
preferred_name_lc: (3z)-2-oxo-4-carboxy-3-hexenedioate => (1e)-4-oxobut-1-ene-1,2,4-tricarboxylate
label: (3Z)-2-oxo-4-carboxy-3-hexenedioate => (1E)-4-oxobut-1-ene-1,2,4-tricarboxylate
label_lc: (3z)-2-oxo-4-carboxy-3-hexenedioate => (1e)-4-oxobut-1-ene-1,2,4-tricarboxylate