NC(=O)C(c1ccccc1)N1OC2C(=O)N(c3ccccc3)C(=O)C2C1c1c2ccccc2c(Cl)c2ccccc12
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?