O=C([C@H](Cc1ccccc1)NS(=O)(=O)c1ccc(Cl)cc1)N1CC[C@@]2(O)CCCC[C@H]2C1
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?