O=C(CC(=O)n1nc(-c2ccccc2)c(/N=N/c2ccccc2C(=O)O)c1-c1ccccc1)Nc1ccc(Cl)cc1
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?