CCN=C(S)Nc1ccc(C2(c3ccc(NC(S)=NCC)c(C)c3)CCCCC2)cc1C
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?