preferred_name: menaquinone-7 + succinate <=> menaquinol-7 + fumarate
preferred_name_lc: menaquinone-7 + succinate <=> menaquinol-7 + fumarate
label: menaquinone-7 + succinate <=> menaquinol-7 + fumarate
label_lc: menaquinone-7 + succinate <=> menaquinol-7 + fumarate