CC1=C(CO)C(=O)OC(C(C)C2CCC3C4CC5OC56C(O)C(N5CC5)=CC(=O)C6(C)C4CCC23C)C1
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?