The novel compound might be a specially designed molecule. It works by targeting specific processes in cancer cells that are crucial for their survival and growth, disrupting them and leading to cell death.
Well, there's no way to really know for sure whether V watches Nero fanfiction without more information about V. V could be into all sorts of different things. Maybe V is more interested in other types of fan works or not into fanfiction at all. If V is a big fan of the source material that Nero comes from, then there might be a higher chance of V reading Nero fanfiction, but it's still just speculation.