C[C@H](NC(=O)c1[nH]cnc1C(=O)N1CCN(c2ccccc2)CC1)C(=O)OC(C)(C)C
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?