O=C(N/N=C1/C[C@@H](O)[C@@H](O)[C@@H]2[C@@H]3C(=O)N(Cc4ccc5c(c4)OCO5)C(=O)[C@H]3CC[C@@H]12)OCc1ccccc1
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?