COc1cc2c(NC3CCN(C)CC3)nc(N3CCCN(C)CC3)nc2cc1OCC1CCNCC1
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?