COCCn1c(C(=O)N2CCCC2)cc2c1C[C@H]1CN(C(=O)c3ccccc3)[C@@](Cc3ccc(OC)cc3)(C(=O)OC)[C@@H]21
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?