CN(C)CCCOc1cc2c(c(-c3ccc(Nc4nc5ccccc5o4)cc3)c1)CNC2=O
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?