CCOc1cc(C2C(C(=O)OC)=C(C)N=C3SC(C)C(=O)N32)ccc1OC(C)=O
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?