CC(=O)N1c2ccccc2C2=CC3C4C(=O)N(c5ccccc5)C(=O)C4C21C1C(=O)N(c2ccccc2)C(=O)C31
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?