Cc1cccc(C2=NN(c3ccc(Br)cc3)[C@@H](C(=O)N3CCOC3=O)[C@@H]2c2ccc(Cl)cc2)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?