COC(=O)[C@H]1[C@H](C(=O)OC)[C@@H](C(=O)OC)N(c2ccc(OC)cc2)[C@@H]1C(=O)OC
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?