Cc1cc(-c2ccc(/N=N/c3cc(S(=O)(=O)[O-])c4ccccc4c3N)c(C)c2)ccc1/N=N/c1cc(S(=O)(=O)[O-])c2ccccc2c1N.[Na+].[Na+]
Hydrogen bond acceptor is the chemical compound which contains the lone electron pairs that participate in the hydrogen bond formation. How many hydrogen bond acceptors does the molecule contain?