Oc1cc(O)c2c(c1)OC(c1ccc(O)c(O)c1)C(OC1(c3cc(O)c(O)c(O)c3)Oc3cc(O)cc(O)c3C(O)C1O)C2
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?