label: beta-D-GalNAc-(1->4)-alpha-L-IdoA-(1->3)-beta-D-GalNAc-4-sulfate-(1->4)-alpha-L-IdoA-(1->3)-D-GalNAc-4-sulfate + H2O => alpha-L-IdoA-(1->3)-beta-D-GalNAc-4-sulfate-(1->4)-alpha-L-IdoA-(1->3)-D-GalNAc-4-sulfate + N-acetyl-D-galactosamine
label_lc: beta-d-galnac-(1->4)-alpha-l-idoa-(1->3)-beta-d-galnac-4-sulfate-(1->4)-alpha-l-idoa-(1->3)-d-galnac-4-sulfate + h2o => alpha-l-idoa-(1->3)-beta-d-galnac-4-sulfate-(1->4)-alpha-l-idoa-(1->3)-d-galnac-4-sulfate + n-acetyl-d-galactosamine