Cc1cc2c(cc1C)[n+]([O-])c(C(=O)C/C(=N/NC(=O)c1ccccc1O)C(=O)Nc1ccccc1C(C)C)c(C)[n+]2[O-]
Molecules possible for drug usually have no more than 5 Hydrogen bond acceptor. How many hydrogen bond acceptors does the molecule have?