CC(=O)O[C@H]1[C@H](C)O[C@@H](Oc2c(-c3ccc(O)cc3)oc3c(CC=C(C)C)c(O)cc(O)c3c2=O)[C@H](O)[C@@H]1O
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?