COc1ccc(-c2cc(C(=O)Nc3cc(S(=O)(=O)N4CCOCC4)ccc3N3CCOCC3)c3ccccc3n2)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?