O=C1Oc2cc3c(c4cccc1c24)O[C@H](c1ccccc1)[C@@H](c1ccccc1)[C@@H]3c1ccc(Cl)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?