Oc1ccccc1-[n+]1c(-c2ccccc2)cc(-c2ccccc2)cc1-c1ccccc1.[O-][Cl+3]([O-])([O-])[O-]
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?