CCOC1=CC2=C(C(=O)C(Cl)=CC2=O)[C@@H]2CN(S(=O)(=O)c3ccc(C)cc3)[C@@H](c3ccccc3)[C@H]12
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?