CCOC(=O)c1c(C)[nH]c(C)c1C(=O)COC(=O)[C@@H](NC(=O)c1ccco1)C(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?