label: 3-(3,4-dihydroxypyridin-1-yl)-L-alanine + acetate + H(+) => 3,4-dihydroxypyridine + O-acetyl-L-serine
label_lc: 3-(3,4-dihydroxypyridin-1-yl)-l-alanine + acetate + h(+) => 3,4-dihydroxypyridine + o-acetyl-l-serine