Cc1c(Cc2ccccc2)c(=O)oc2c(C)c(OC(C)C(=O)NC[C@H]3CC[C@H](C(=O)O)CC3)ccc12
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?