COc1cccc(N(C(=O)Cn2nnc(-c3ccc(C)cc3)n2)C(C(=O)NC(C)(C)C)c2c[nH]c3ccccc23)c1
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?