CCCCn1c(=O)n(CC(=O)NCc2ccc(C)cc2)c(=O)c2c1nc(CO)n2CCC
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?