CC(=O)N1N=C(c2ccccc2Nc2ccccc2C2=NN(C(C)=O)C(c3ccccc3)O2)OC1c1ccccc1
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?