COC(=O)c1ccc(NC(=O)CC2C(=O)N(c3cccc(OC)c3)C(=O)N2Cc2cccc(OC)c2)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?