O=C1/C(=C/c2ccc(Oc3ccccc3)cc2)N=C(c2ccccc2)N1c1ccc(S(=O)(=O)Nc2nccs2)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?