CC(=O)OC1=C2CC3(C)OC(=O)CC(C)(C)C3=CC=C2C=C(C(C)C)C1=O
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. Amide C-N bonds are not counted because of their high barrier to rotation.  How many rotatable bonds does the molecule have?