CC(C)(C)c1ccc(C(C)(C)C)c(N2C(=O)[C@@H]3[C@@H]4C=C[C@@H](C4)[C@]3(C)C2=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?