CCn1c(C)nc2cc(C(=O)NNC(=O)[C@@H](NC(=O)c3cc(OC)cc(OC)c3)C(C)C)ccc21
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?