So what are we actually targeting in the the glucosepane molecule? Is the cycloheptane ring that needs to be broken? Is it still a cycloheptane ring if it has a nitrogen attached to it? Wikipedia finally has a picture, so maybe we can get some visual explanations.
Here's a pic of our mortal (pun intended) enemy, Glucosepane:
Here's the precursor(Fructoselysine):
Glucose:
Lysine: