CC(C)CCCC(C)[C@H]1CC[C@H]2N/C(=N/c3ccccc3)CCC[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?