CCOC(=O)N1CCN(S(=O)(=O)c2ccc(C(=O)Nc3sc4c(c3C#N)CC(C)(C)NC4(C)C)cc2)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?