CC(C)(C)OC(=O)C1C(=O)NC(=O)CC1C(OCc1ccccc1)C(OCc1ccccc1)C(COCc1ccccc1)OCc1ccccc1
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?