COC(=O)C1=C(OC(=O)c2ccccc2)C(C(=O)OC)[C@]2(O)[C@@H](C(=O)OC)[C@H]1C[C@@H](c1ccccc1)[C@@H]2C(=O)OC
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?