C/C(=N/NC(=O)C(N)=O)C(CC(C(=O)Nc1ccccc1C)/C(C)=N\NC(=O)C(N)=O)C(=O)Nc1ccccc1C
Hydrogen bond acceptor is the chemical compound which contains the lone electron pairs that participate in the hydrogen bond formation. How many hydrogen bond acceptors does the molecule contain?