COc1ccc(N2C(=O)C3[C@@H](C2=O)C2(Cl)C(Cl)=C(Cl)C3(Cl)C2(OC)OC)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?