NC(=O)CSc1nc2c(c(=O)n1-c1ccccc1)C1(CCCCC1)Cc1ccccc1-2
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?