Cc1ccc(C(C)C)c(OCc2n[n+](CC(=O)c3ccc(OC(F)F)cc3)c3n2CCCCC3)c1.[Br-]
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?