COc1ccccc1NC(=O)c1sc2nc(C)c(C(=O)Nc3ccc(C)cc3C)c(-c3cccs3)c2c1N
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?