CN1CCN(Cc2nc3ccccc3c(=O)n2Cc2nc(-c3ccc4ccccc4c3)cs2)CC1.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?