CC(C)CN(C(=O)CN1CCN(S(=O)(=O)c2ccccc2)CC1)c1c(N)n(CC(C)C)c(=O)[nH]c1=O
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?