C#CCOCCOCCOCCNc1nc(N2CCN(C(=O)[C@H](C(C)C)n3cc(CCO)nn3)CC2)nc(N2CCN(C(=O)[C@H](C(C)C)n3cc(CCO)nn3)CC2)n1
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?