CCc1ccc(-n2c(SCc3cc(=O)n4cc(Br)ccc4n3)nc3nncc-3c2O)cc1
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?