preferred_name: butanoyl-CoA + FAD + H(+) => (2E)-butenoyl-CoA + FADH2
preferred_name_lc: butanoyl-coa + fad + h(+) => (2e)-butenoyl-coa + fadh2
label: butanoyl-CoA + FAD + H(+) => (2E)-butenoyl-CoA + FADH2
label_lc: butanoyl-coa + fad + h(+) => (2e)-butenoyl-coa + fadh2