Cc1ccc(C)c(-n2nc3c4c(ccc3c2O)C(=O)c2ccccc2C4=O)c1
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?