COc1cc(-c2[nH]c(C(=O)NCC3CCCO3)cc3c4ccccc4nc2-3)cc(OC)c1OC
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?