CC[C@H](C)C1=C(O)[N@+]2([O-])Oc3ccc(-c4c(O)c(O)c(-c5ccc(OC(C)=O)cc5)c(OC(C)=O)c4OC(C)=O)cc3O[C@]2([C@@H](C)CC)C(=O)N1O
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?