C=C1CCC[C@]2(C)C[C@H]3OC(=O)C(CNC(C)CC)[C@H]3CC12
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?