N=C1/C(=C\c2ccc(OC(=O)c3ccccc3)cc2)C(=O)N=C2SC(N3CCOCC3)=NN12
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?