COc1cc(OC)c2c(-c3ccccc3)cc(=O)oc2c1C(CC(=O)N1CCN(c2ccccc2)CC1)c1ccc2c(c1)OCO2
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?