CC(C)(C)OC(=O)NCCCCC(NC(=O)C(Cc1c[nH]c2ccccc12)NC(=O)OCC1c2ccccc2-c2ccccc21)C(=O)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?