CN(C(=O)Cc1ccc(Cl)cc1Cl)[C@@H]1CCCC[C@@H]1N1CCCC1.O=C(O)/C=C/C(=O)O
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?