preferred_name: menaquinone-9 + AH2 = beta-dihydromenaquinone-9 + A
preferred_name_lc: menaquinone-9 + ah2 = beta-dihydromenaquinone-9 + a
label: menaquinone-9 + AH2 = beta-dihydromenaquinone-9 + A
label_lc: menaquinone-9 + ah2 = beta-dihydromenaquinone-9 + a