COC(=O)c1ccc(NC(=O)CSc2nc3ccc(N4C(=O)C5C6C=CC(C6)C5C4=O)cc3s2)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?