Cc1cc2c(c3oc(C4(C)OC4C4OC4C)cc(=O)c13)C(=O)c1c(O)c(C3CC(C)(N(C)C)C(O)C(C)O3)cc(C3CC(N(C)C)C(O)C(C)O3)c1C2=O
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?