CCN1CCN(c2ccc(-n3c(C)nc4c(cnn4-c4ccccc4Cl)c3=O)cc2)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?