C=C1CC2C(CCC3(C)C2CCC3(O)C(C)=O)C2(C)CCC(=O)C=C12
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?