CN(C)CC(O)CN1C(=O)N(CN2C(=O)N(CC(O)CN(C)C)C(=O)C2(C)C)C(C)(C)C1=O
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?