CC[C@H](C)[C@H](NC(=O)OCc1ccccc1)C(=O)OCC(=O)N1CCN(c2ccc(OC)cc2)CC1
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?