CN1C2(c3ccccc3)c3c(-c4ccccc4)sc(-c4ccccc4)c3C1(c1ccccc1)C1C(=O)N(c3ccccc3)C(=O)C12
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?