S=c1nc(Nc2ccc(Br)cc2)c2c3c(sc2[nH]1)CN(N1CCc2c(sc4[nH]c(=S)nc(Nc5ccc(Br)cc5)c24)C1)CC3
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. How many bonds in the molecule are rotatable?