Cc1ccc2c(c1)C(=O)OC(C(=O)Nc1ncc(Cc3ccccc3)s1)C2
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?