COc1cc2c(cc1Oc1ccc(OC)c3c1CC1c4c(cc(OC)c(OC)c4-3)CCN1C)CC1c3c(cc(OC)c(OC)c3-2)CCN1C.Cl
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?