C#CCOCCOCCOCCNc1nc(N2CCN(C(=O)[C@H](CCCCN)n3cc(CN)nn3)CC2)nc(N2CCN(C(=O)[C@H](CO)n3cc([C@@H](N)C(C)C)nn3)CC2)n1
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?