COC(=O)c1c(CC(Cc2ccc3c(c2)CCCC3)C(=O)OC)ccc2c1CCCC2
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?