COC(=O)[C@@H]1C[C@H]2OC(=O)CC[C@]2(C)O[C@H]1[C@H]1O[C@@](C)(O)CCC[C@H]1C
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?