Cc1c(N=C2NC(=O)C(CC(=O)Nc3ccccc3)S2)c(=O)n(-c2ccccc2)n1C
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?