C[C@@H]1[C@H]2CC[C@@H]3[C@@H]4CC=C5C[C@@H](N(C)C)CC[C@]5(C)[C@@H]4CC[C@]23CN1C
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?