COc1ccc(NC(=O)Nc2ccc3c(c2)C(=O)N([C@H](C)CO)C[C@H](C)[C@@H](CN(C)C(=O)Nc2ccc4c(c2)OCO4)O3)cc1
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?