CC1(C)[C@H]2CC[C@]1(C)[C@H](OC(=O)NNC(=O)O[C@@H]1C[C@@H]3CC[C@@]1(C)C3(C)C)C2
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. How many bonds in the molecule are rotatable?