CC(=O)c1cccc(-n2c(=O)c3c4c(sc3n(CC(=O)c3ccc(Cl)cc3)c2=O)CN(C(C)=O)CC4)c1
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?