COC(=O)C(c1ccccc1)N(Cc1cccc(CN(C(C(=O)OC)c2ccccc2)S(C)(=O)=O)c1)S(C)(=O)=O
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?