preferred_name: (3E,5R)-5-carboxy-2-oxohept-3-enedioate => (2E,4Z)-5-hydroxypenta-2,4-diene-1,2,5-tricarboxylate
preferred_name_lc: (3e,5r)-5-carboxy-2-oxohept-3-enedioate => (2e,4z)-5-hydroxypenta-2,4-diene-1,2,5-tricarboxylate
label: (3E,5R)-5-carboxy-2-oxohept-3-enedioate => (2E,4Z)-5-hydroxypenta-2,4-diene-1,2,5-tricarboxylate
label_lc: (3e,5r)-5-carboxy-2-oxohept-3-enedioate => (2e,4z)-5-hydroxypenta-2,4-diene-1,2,5-tricarboxylate