CCc1cc(-c2nnn(CCC3COCCO3)c2C(C)(C)O)ccc1-c1cn(CCc2c[nH]c3ccccc23)nn1
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?