CCOC(=O)C1N(S(=O)(=O)c2ccc(C)cc2)CCC12c1ccccc1N(C(C)=O)C2c1ccc(OC)c(OC)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?