O=C1CC2(CCC(O)(c3ccc(Cl)cc3)C(C(=O)c3ccc(Cl)cc3)C2)C(=O)c2ccccc2N1
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?