O=C(O)c1ccc(N2CC3CC(C2)c2cccc(=O)n2C3)c(NC(S)=Nc2ccc(Cl)cc2Cl)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?