CC(OC(=O)C1CCN(S(=O)(=O)c2ccc(C(C)(C)C)cc2)CC1)C(=O)N(C)C1CCCCC1
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?