CCOC(=O)c1c(NC(=O)CSc2cn(CCNC(=O)c3ccc(OC)c(OC)c3)c3ccccc23)sc2c1CCC2
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?