COc1ccc2c(c1)C(=O)N1[C@H]3c4cc(Cl)ccc4OC[C@@H]3[C@H](c3ccccc3)[C@]1(C)C(=O)N2
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?