preferred_name: 5,6,7,8-tetrahydromethanopterin + A <=> 7,8-dihydromethanopterin + AH2
preferred_name_lc: 5,6,7,8-tetrahydromethanopterin + a <=> 7,8-dihydromethanopterin + ah2
label: 5,6,7,8-tetrahydromethanopterin + A <=> 7,8-dihydromethanopterin + AH2
label_lc: 5,6,7,8-tetrahydromethanopterin + a <=> 7,8-dihydromethanopterin + ah2