Cc1ccc(S(=O)(=O)N2C[C@H]3[C@H]4C(=O)N(c5ccccc5)C(=O)[C@H]4C[C@H](OC(=O)NC4CC4)[C@@]3(O)C2)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?