COc1cccc(N(CC(=O)NC2CCCC2)C(=O)Cn2nnc(-c3ccc(C)o3)n2)c1
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?