Cc1ccnc(NS(=O)(=O)c2ccc(NC(=O)CSc3nc(O)cc(-c4ccccc4)n3)cc2)n1
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?