COc1cc2c(cc1OC)C(C)N(C(=O)c1cc3c(s1)-c1c(C)cccc1OC3)CC2
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?