C#CCOCCOCCOCCNc1nc(N2CCN(C(=O)Cn3cc(CCCCN)nn3)CC2)nc(N2CCN(C(=O)[C@H]([C@@H](C)CC)n3cc(CCCN=C(N)N)nn3)CC2)n1.Cl
Hydrogen bond acceptor is the chemical compound which contains the lone electron pairs that participate in the hydrogen bond formation. This compound should contain a more electronegative atom (more electronegative than hydrogen) with lone electron pairs. Then it can attract protons from a donor. Moreover, the electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?