CC(=O)OC1C(O)C(C)OC(OC(=O)C2CCC3C(C2)OC2(CC(OC(=O)/C=C/c4ccccc4)C(C)CO2)C32CO2)C1OC1OC(C)C(O)C(O)C1O
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?