CCOc1ccc(N2C(=O)c3ccc(C(=O)OCC(=O)N(CC)C4CCS(=O)(=O)C4)cc3C2=O)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?