O=C1[C@H]2O[C@@H]2[C@@H](O)[C@H]2[C@H]1CCn1c(=O)n(Cc3cc4c(cc3Cl)OCO4)c(=O)n12
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?