O=c1n(-c2ccccc2)c(=O)n2n1CC[C@H]1/C(=N\OCc3ccccc3)[C@H]3O[C@@H]3[C@@H](O)[C@@H]12
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?