preferred_name: L-methionine + acetate => N(alpha)-acetyl-L-methionine + H2O
preferred_name_lc: l-methionine + acetate => n(alpha)-acetyl-l-methionine + h2o
label: L-methionine + acetate => N(alpha)-acetyl-L-methionine + H2O
label_lc: l-methionine + acetate => n(alpha)-acetyl-l-methionine + h2o