C=C1CC2OC2(C(=O)O[C@H]2CCC3[C@@H]4CCC5=CC(=O)CC[C@]5(C)C4CC[C@@]32C)C1=O
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?