Cc1cc(C)n2nc(SCC(=O)c3c(N)n(CC(C)C)c(=O)n(C)c3=O)nc2n1
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?