CN(C)c1cccc2c(S(=O)(=O)N(CCN)c3cncc(-c4ccc5cnccc5c4)c3)cccc12
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?