NCC[C@H](O)C(=O)N[C@H]1C[C@@H](N)[C@@H](O[C@H]2O[C@@H](CN)[C@@H](O)[C@@H](O)[C@@H]2N)[C@@H](O[C@H]2O[C@@H](CO)[C@@H](O)[C@@H]2O)[C@@H]1O
Hydrogen bond acceptor: The atom, ion, or molecule component of a hydrogen bond which does not supply the bridging (shared) hydrogen atom. How many hydrogen bond acceptors does the molecule have?