CCC(C)n1c(O)c(C(c2ccccn2)c2c(O)n(C(C)CC)c(=S)[nH]c2=O)c(=O)[nH]c1=S
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?