COc1ccc(OC)c(C2c3[nH]c4ccccc4c3C[C@H]3C(=O)N(CCCOC(C)C)CC(=O)N23)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?