COc1cc(OC)c2ccc(=O)oc2c1C(CCN1CCN(c2ccccc2)CC1)c1ccc2c(c1)OCO2
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?