C=CC[C@@H](CC(=O)N[C@@H](CO)Cc1ccccc1)C(=O)NC[C@@H](OC(=O)[C@@H](CC=C)CC(=O)OC(C)(C)C)c1ccccc1
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?