A very good idea for an add-on, I gave 5 stars since its a new add-on and wanna see it grow, but at the moment it doesn't bring up much results. I entered the name of a class of compound I am researching lately (phthalocyanine) and it gave about 8 links, all from dx.plos.org. They're all related to the biology/medicine side of things. I'm a chem student myself, so I'm looking for articles on synthesis and stuff like that. I recommend hooking this up to as many scientific databases as possible, so that I can use it like I would scifinder or reaxys, or google scholar etc.