C[C@]12CC[C@H]3[C@@H](CCC4=C[C@@H](OC5OCC(OC6OC(CO)C(O)C(O)C6O)C(O)C5O)CC[C@@]43C=O)[C@@]1(O)CCC2C1=CC(=O)OC1
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?