label: N(6),N(6)-dimethyl-L-lysyl(37)-[histone H3] + S-adenosyl-L-methionine = N(6),N(6),N(6)-trimethyl-L-lysyl(37)-[histone H3] + S-adenosyl-L-homocysteine + H(+)
label_lc: n(6),n(6)-dimethyl-l-lysyl(37)-[histone h3] + s-adenosyl-l-methionine = n(6),n(6),n(6)-trimethyl-l-lysyl(37)-[histone h3] + s-adenosyl-l-homocysteine + h(+)