C(=C/c1c2oc(-c3ccccc3)cc(-c3ccccc3)c-2c2ccccc12)\C=C1/c2ccccc2-c2c(-c3ccccc3)cc(-c3ccccc3)[o+]c21.[O-][Cl+3]([O-])([O-])[O-]
Hydrogen bond acceptor is the chemical compound which contains the lone electron pairs that participate in the hydrogen bond formation. This compound should contain a more electronegative atom (more electronegative than hydrogen) with lone electron pairs. Then it can attract protons from a donor. Moreover, the electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?