COc1cc(CN2CCCC(C(=O)c3ccc4c5c(cccc35)CC4)C2)cc(OC)c1O
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?