CC(=O)OC1C(Oc2c(C)cc3c(c2O)[C@@H](C)CC[C@@H]3[C@@H](C)CCC=C(C)C)OCC(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?