[2H]c1c([2H])c([2H])c(C(=O)c2sc(N3CCCCCC3)nc2-c2ccccc2)c([2H])c1[2H]
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?