CCOc1ccc(CCNC(=O)C2CCN(Cc3nc(-c4ccc(OC)c(OC)c4)oc3C)CC2)cc1OCC
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?