hercynine + L-cysteine + O2 = S-(hercyn-2-yl)-L-cysteine S-oxide + H2O
hercynine + l-cysteine + o2 = s-(hercyn-2-yl)-l-cysteine s-oxide + h2o
hercynine + L-cysteine + O2 = S-(hercyn-2-yl)-L-cysteine S-oxide + H2O
hercynine + l-cysteine + o2 = s-(hercyn-2-yl)-l-cysteine s-oxide + h2o