COc1cc(NC(=O)C2CC(=O)NC3=C2C(=O)CC(C)(C)C3)c(OC)cc1Cl
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?