CC1(C)C(=O)C=CC2(C)C1CC(O)C1(C)C2CCC2(C)C(c3ccoc3)OC(=O)C3OC321
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?