COc1cc2c(cc1OC)[C@]13CCN4CC5=CCO[C@H](CC(=O)O)[C@H]([C@H]5C[C@H]41)[C@H]3N2
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?