COC(=O)C(Cc1cc(OC)c(OC)c(OC)c1)(NC(=O)c1ccccc1)P(=O)(OC)OC
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?