Cc1c(C(=O)O)c(O)cc2c1C(=O)c1c(O)c(O[C@H]3OC(CO)C(O)C(O)C3O)c(O)c(O)c1C2=O
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?