label: N,N',N'',N'''-tetraacetylchitotetraonate + H(+) => N,N',N'',N'''-tetraacetylchitotetraono-1,5-lactone + H2O
label_lc: n,n',n'',n'''-tetraacetylchitotetraonate + h(+) => n,n',n'',n'''-tetraacetylchitotetraono-1,5-lactone + h2o