Cc1ccc2c(O)c3c(cc2c1)C(=O)c1c2c(cc(O)c1C3=O)C1(C)OC(O2)C(O)C(N(C)C)C1O
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?