CCOC(=O)N1CCN(C(=O)c2cnc3ccc(S(=O)(=O)N(C)c4ccc(OCC)cc4)cc3c2O)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?