CN(CCc1ccccc1)C(=O)c1cccc(NC(=O)Cc2cccc(NC(=O)C3CCN(C(=O)C4CCC4)CC3)c2)c1
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?