CCOC(=O)C1CCN(C(=O)CNC(=O)c2nn(-c3ccc(OC)c(Cl)c3)c(=O)c3ccccc23)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?