COc1ccc2c(c1)[n+]([O-])c(/C(C)=N/NC(N)=S)c(C)[n+]2[O-]
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?