COc1cccc(CN2C(=O)N(C(C)C)C(N(O)C(=O)NC(C)C)C2(C)C)c1OC
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?