User blog comment:Noddite/Item Descriptions/@comment-1672596-20130615175523/@comment-1672596-20130615205956

In case the reason you haven't transcribed the pentazemin description is because you are having trouble finding it, you can find one near the start of the Downtown area of Act 1, by turning right when you get to the first area, then right, then left and then right again. It should be right there. You can also find one in Crescent Meridian, specifically in the first ruined building to your left shortly after the cutscene that plays upon entering the area. There's also one in the Cove Valley Village's SVD building (obviously, you're going to need to take out some PMC troops before they do summary executions on the guerillas before you can access them), one in the Power Station's transformer area (right below the transformer itself), and within the Vista Mansion (near the entry point in fact, next to the Playboy) in Act 2. In addition, one was near the center of the Midtown Central Sector in Act 3. Lastly, there's one in Otacon's old lab (specifically the central bullpens) in Act 4. Your best bet is probably in Act 2. Of course, if you already have it, please ignore my advice.