COc1ccc(CN2CC(=O)N3[C@H]4c5cc(C)ccc5OC[C@@H]4[C@H](c4ccccc4)[C@]3(C)C2=O)cc1
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. How many bonds in the molecule are rotatable?