CSc1cccc(N2CC(C(=O)N(CC(C)C)c3c(N)n(Cc4ccccc4)c(=O)[nH]c3=O)CC2=O)c1
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?