C=C[C@@H]1C(CO)=CCC2[C@H]1CCC1C(C)(C)C(=O)CC[C@]21C
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?