COc1cccc(CNC(=O)CCC(=O)N2C[C@H]3C[C@H](C2)c2cccc(=O)n2C3)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?