COc1ccc(CCNC(=O)Cn2cc(C(=O)c3ccccc3)c(=O)c3ccc(C)nc32)cc1OC
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?