CCOc1ccc(CNC(=O)CCS(=O)(=O)c2cc3c4c(c2)CCN4C(=O)CC3)cc1OC
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?