COc1cccc([C@@H]2Oc3ccc(OC)cc3C(=O)[C@H]2OC(=O)Nc2ccc(C)c(Br)c2)c1
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?