Nc1ccc(Oc2ccc(C34CC5C6CC7(c8ccc(Oc9ccc(N)cc9)cc8)CC5C(C3)C(C7)C6C4)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?