CC1(C)c2[nH]c3ccccc3c2C[C@H]2C(=O)N(Cc3ccccc3F)C(=O)N21
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?