CC(=O)Oc1ccc(C(=O)[C@H]2[C@H]3C(=O)N(c4ccc(C)cc4)C(=O)[C@H]3[C@@H]3C=CC=NN32)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?