CC(=O)N(CCc1ccccc1)C(C#N)c1ccc(OCCCCCCCCCCOc2ccc(C(C#N)N(CCc3ccccc3)C(C)=O)cc2)cc1
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?