CN[C@@H](C)C(=O)N[C@H](C(=O)N[C@@H](CCCNC(=O)OCc1ccccc1)C(=O)NC1CCCc2ccccc21)C(C)C.O=CO
Molecules possible for drug usually have no more than 5 Hydrogen bond acceptor. How many hydrogen bond acceptors does the molecule have?