COc1ccc(OC)c2nc(O)c(CCNC(=O)C(=O)c3c[nH]c4ccccc34)cc12
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?