Cn1c(SCC(=O)Nc2cc(=O)n(C)c(=O)n2C)nnc1C12CC3CC(CC(C3)C1)C2
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?