label: cyclo(L-arginyl-(Z)-dehydro-3,4-dihydroxytyrosyl) + O-acetyl-L-homoserine <=> cyclo(L-arginyl-(Z)-dehydro-4-O-homoseryl-tyrosyl) + acetate + H(+)
label_lc: cyclo(l-arginyl-(z)-dehydro-3,4-dihydroxytyrosyl) + o-acetyl-l-homoserine <=> cyclo(l-arginyl-(z)-dehydro-4-o-homoseryl-tyrosyl) + acetate + h(+)