CC(C)(C)c1cc(C2=NOC(c3ccccc3)N2c2ccccc2)cc(C(C)(C)C)c1O
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?