O=C(CSc1nc(C2CCCCC2)n(-c2ccccc2)n1)NCCN1C(=O)CSC1=O
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?