COc1ccc(N(CC(=O)Nc2cc(C)cc(C)c2)S(=O)(=O)c2ccccc2[N+](=O)[O-])c(OC)c1
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?