CCOC(=O)c1cccc(NC(=O)CCc2c(C)nn(-c3ccc(N4CCOCC4)nn3)c2C)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?