CC(=O)Nc1ccc(S(=O)(=O)Nc2nc(-c3ccc(Cl)cc3)cc(N3N=C(c4ccc(Br)cc4)CC3c3ccccc3)n2)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?