preferred_name: N(alpha),N(alpha)-dimethyl-L-histidine + S-adenosyl-L-homocysteine + H(+) => N(alpha)-methyl-L-histidine + S-adenosyl-L-methionine
preferred_name_lc: n(alpha),n(alpha)-dimethyl-l-histidine + s-adenosyl-l-homocysteine + h(+) => n(alpha)-methyl-l-histidine + s-adenosyl-l-methionine
label: N(alpha),N(alpha)-dimethyl-L-histidine + S-adenosyl-L-homocysteine + H(+) => N(alpha)-methyl-L-histidine + S-adenosyl-L-methionine
label_lc: n(alpha),n(alpha)-dimethyl-l-histidine + s-adenosyl-l-homocysteine + h(+) => n(alpha)-methyl-l-histidine + s-adenosyl-l-methionine