COC(=O)C1=CO[C@@H](C)[C@@H]2CN3CC[C@]4(C(=O)Nc5ccccc54)[C@@H]3C[C@H]12
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?