COC(=O)C1=C(c2ccccc2OCc2ccccc2)C[C@@H]2CC[C@H]1N2C(=O)NCc1ccc(C(C)(C)C)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?