CC1(C)[C@@H]2C[C@H]1[C@H](C(O)[C@@H]1c3cc(-c4ccccn4)ncc3[C@@H]3C[C@H]1C3(C)C)c1cc(-c3ccccn3)ncc12
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?