COc1ccc(CCN2C(=O)C3C4C=CC(C3C2=O)C2C(=O)N(CCc3ccc(OC)c(OC)c3)C(=O)C42)cc1OC
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?