preferred_name: fumarate + FADH2 <=> succinate + FAD (Gallus gallus)
preferred_name_lc: fumarate + fadh2 <=> succinate + fad (gallus gallus)
label: fumarate + FADH2 <=> succinate + FAD (Gallus gallus)
label_lc: fumarate + fadh2 <=> succinate + fad (gallus gallus)