CCC(C(=O)Nc1ccc(C(=O)OC)cc1)n1nc(-c2ccc(C)cc2)c2c(c1=O)CCCC2
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?