COc1ccc2[nH]cc(CCNC(=O)[C@](O)(Cc3cn(C)c4ccccc34)[C@@]3(O)OCC(O)C3O)c2c1
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?