label: 2-demethylmenaquinol-13 + S-adenosyl-L-methionine <=> menaquinol-13 + S-adenosyl-L-homocysteine + H(+)
label_lc: 2-demethylmenaquinol-13 + s-adenosyl-l-methionine <=> menaquinol-13 + s-adenosyl-l-homocysteine + h(+)