CC1NOC(NS(=O)(=O)c2ccc(/N=N/c3c(O)c(C(=O)O)cc4ccccc34)cc2)C1C
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?