CCOC(=O)c1c(C)n(-c2ccc(C)cc2)c2c(CC(C)=O)c(Br)c(OC)c(O)c12
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?