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
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. How many bonds in the molecule are rotatable?