CC(C)N1CCc2c(sc(NC(=O)c3cc(-c4cccs4)nc4ccccc34)c2C(N)=O)C1.Cl
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?