C[C@]12C=CC(=O)C=C1C=C[C@@H]1C2CC[C@]2(C)C(=O)CCC12
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?