CCC(C)N1C(=O)/C(=C\c2cc3c4c(c2)CCCN4CCC3)C(=O)NC1=S
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?