CCn1c2c(c(=O)n3ncc(C(=O)N4CCN(c5ccccc5)CC4)c13)CN(Cc1ccc(OC)cc1)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?