C=C1C(=O)O[C@H]2[C@@H]1[C@H](OC(=O)/C(C)=C/C)[C@]1(C)C(=O)C=C[C@H]1[C@H](C)[C@H]2O
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?