CC(C)c1nnc(N2C(=O)c3oc4ccccc4c(=O)c3C2c2ccc(O)cc2)s1
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?