CCOC(=O)C(Cc1c(-c2[nH]c3ccccc3c2CC(NC(=O)CNC(C)=O)C(=O)OCC)[nH]c2ccccc12)NC(=O)CNC(C)=O
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?