C=CC[C@@H](CC(=O)N[C@@H](CO)Cc1ccccc1)C(=O)N[C@@H](COC(=O)[C@@H](CC=C)CC(=O)OC(C)(C)C)Cc1c[nH]c2ccccc12
Molecules possible for drug usually have no more than 5 Hydrogen bond acceptor. How many hydrogen bond acceptors does the molecule have?