CCOC(=O)c1c(-n2c(C)cc(/C=C3/C(=O)NC(=O)N(CC)C3=O)c2C)sc2c1CCCC2
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?