COc1c2c(cc3oc(CO[C@@H]4O[C@H](CO)[C@@H](O)[C@H](O)[C@H]4O)cc(=O)c13)O[C@H](C(C)(C)O)C2
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?