CC(C)NC(=O)N(C)C[C@H]1Oc2ccc(NC(=O)C3CCCCC3)cc2C(=O)N([C@H](C)CO)C[C@@H]1C
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?