CC1=C(C2=C(C)C(C(C)C)C3=C(C(=O)C(O)C3O)C2O)C(O)C2=C(C(O)C(O)C2=O)C1C(C)C
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?