Cc1ccc(N2CCN(C(=O)Cn3ncc4c([nH]c5ccc(C)cc54)c3=O)CC2)c(C)c1
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?