O=C(NCC1(N2CCCCC2)CCCCC1)C1CC(=O)N(c2ccc3c(c2)OCCO3)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?