C[C@@H]1C(=O)O[C@@H]2CC34[C@H]5C[C@@H](C(C)(C)C)C36[C@H](OC(=O)[C@@H]6O)OC4(C(=O)O5)[C@@]12O
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?