Ic1ccc2c(c1)N(c1ccccc1)c1cc([N-]c3ccc4nc5ccc(I)cc5[n+](-c5ccccc5)c4c3)ccc1N2
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?