CC1CCc2c(sc(NC(=O)C3c4ccccc4Oc4ccccc43)c2C(=O)OC(C)C)C1
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?