CC12CCC(C(=O)N3CCN(C(c4ccccc4)c4ccccc4)CC3)(OC1=O)C2(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?