COC(=O)c1cccc(C23CC4(C2)[C@@H](c2ccccc2)N(C)C[C@@H]4C3c2ccccc2)c1
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?