Cc1cc2c(cc1C)[n+]([O-])c(C(=O)/C=C/c1ccc3c(c1)OCO3)c(C)[n+]2[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?