CCOC(=O)c1c(CSc2ccccc2)n(C)c2cc(Br)c(OCC(O)CNC(CO)(CO)CO)cc12
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?