COc1ccc(CN2CCc3c(c(=O)n4ncc(C(=O)N5CCN(c6ccccc6OC)CC5)c4n3C)C2)cc1
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?