Cc1cc(OCC(=O)N2C[C@@H]3C[C@H](C2)Cn2c3cccc2=O)c2c(C)cc(=O)oc2c1
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?