Cc1ccc(C(=O)COC(=O)c2cccc(N3C(=O)c4c(C)nc5ccccc5c4C3=O)c2)cc1C
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?