Cc1ccc(-c2nc3nc(C)cc(N4CCN(c5cccc(C)c5)C(C)C4)n3n2)cc1
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?