COc1cc([C@@H]2c3cc4c(cc3[C@@H](Nc3ccccc3C(=O)c3ccccc3)[C@H]3COC(=O)[C@@H]32)OCO4)cc(OC)c1OC
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?