CCOC(=O)C1C(=O)C=C(c2ccc(NS(C)(=O)=O)cc2)CC1c1ccco1
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?