Cc1oc2cc3oc(=O)c(CCC(=O)N(C)CC(=O)O)c(C)c3cc2c1C
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?