Cc1ccc(-n2cc(CN3CCN(Cc4nccn4C)CC3)c(-c3cccc(C)c3)n2)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?