C[C@@]12C(=O)Nc3ccccc3C(=O)N1[C@H]1c3cc(Cl)ccc3OC[C@@H]1[C@@H]2c1ccccc1
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?