CCC(Sc1nc2sc(C(=O)OC)c(C)c2c(=O)n1N)C(=O)N(CC)CC
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?