COC(=O)C1=COC(C)C2CN3CCc4c([nH]c5cc(OC)c(OC)cc45)C3CC12.O=C(O)CC(O)(CC(=O)O)C(=O)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?