C[C@]12CC[C@H]3[C@@H](CCC4=C[C@@H](O)CC[C@@]43C)[C@@H]1CC(=C\c1ccncc1)/C2=N\O
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?