Cc1ccc(-c2cc(C(=O)OCC(=O)N(C)C3CCS(=O)(=O)C3)c3ccccc3n2)c(C)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?