Cc1cc(C)c2c(C)c(C(=O)N3CCC(c4nc5ccccc5s4)CC3)oc2c1
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?