CCC(C)NC(=O)Cn1c(=O)n(-c2ccc(C)c(C)c2)c(=O)c2c3c(sc21)CCCCC3
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?