COc1ccc2c(c1OC)C(=O)N1C2SC[C@H]1C(=O)NC1CC(C)(C)NC(C)(C)C1
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?