CC1OC(OC2C(Oc3cc(O)c4c(c3)O[C@H](c3ccc(O)cc3)CC4=O)OC(CO)C(O)C2O)C(O)C(O)C1O
Hydrogen bond acceptor: The atom, ion, or molecule component of a hydrogen bond which does not supply the bridging (shared) hydrogen atom. How many hydrogen bond acceptors does the molecule have?