COC(=O)[C@H](COC(C)(C)C)NC(=O)O[C@@H]1C(=O)c2cc(OC)ccc2O[C@H]1c1cccc(OC)c1
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?