O=C1[C@H]2C(c3ccc(Cl)cc3)N(c3ccccc3)O[C@H]2C(=O)N1c1ccc(Cc2ccc(N3C(=O)[C@H]4ON(c5ccccc5)C(c5ccc(Cl)cc5)[C@H]4C3=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?