CC(C)(C)[C@@H]1COC(=O)[C@@H](NC(=O)OCC2c3ccccc3-c3ccccc32)C/C=C\C[C@@H](CC(=O)NCCO)C(=O)N1
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?