CC(C)Oc1c(O)c2c3c(oc(=O)n3C=CC2c2ccccc2)c1OC(C)C
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?