C[C@@H]1[C@H]2[C@@H]3CC[C@@H](C3)[C@H]2CN[C@H]1c1cn(Cc2ccccc2)c2ccccc12
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?