CN1C2CCC1CC(OC(=O)C(CO)c1ccccc1)C2.CN1C2CCC1CC(OC(=O)C(CO)c1ccccc1)C2.O=S(=O)(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?