I've been seeing quite a few candidate seminars recently, so allow me to pass on some advice to those of you out on the first-job-in-the-drug-industry trail.
First off, some presentation tips: Speak up, if possible. I hear ten too-soft seminars for every too-loud one. Don't give your talk to the screen - either the one on your laptop or the one on the wall. Give it to the people in the room. Look up, turn around, do what you need to do to give them the sense that you're passing information on to them. Find a way to sound somewhere between the extremes of here-is-my-script and gosh-I-don't-remember-this-slide.
As for that information, slides in a scientific presentation should have a medium amount of information on them. A whole slide with one big reaction on it is OK during the introduction, but you'd better fill things out a bit as you move on in the talk. Your audience can tell if you're padding things out.
But don't make the opposite error, putting all your information on one slide in One Big Table. You might think it looks more impressive that way, but it's just irritatingly illegible and uninterpretable. Spread those big data heaps out a bit into coherent piles - put all the aliphatic examples on a slide, followed by the aromatic ones, and so on. You'll find more things to talk about that way, too.
Be honest. If you have to come in with a thin talk, for whatever reason, admit it to yourself and be prepared to admit it in some fashion to your audience. Find some ways to show them that you know more than your slides can illustrate. And don't try to pretend that your results are groundbreaking and exciting, unless they really, really are. Exciting results usually speak for themselves, and your audience will know 'em when they see 'em.
Be prepared for the obvious. If you put a weird reaction up on the screen, someone is going to ask you about the mechanism. If you have some unusual results in a series, someone's going to ask you why you think they came out that way. Be ready with some ideas - it can be fine to not know the answer yet, as long as you've shown that you've thought about what the answer might be. Looking unprepared for down-the-middle pitchs like these will get you crossed off the list very quickly.
And look as if you can learn. No one comes into the drug industry knowing what they really need to know. It comes with experience, and you need to make it clear that you're the sort of person that experience is not wasted on.
That should help. I'll settle for a fee of 10% of your first year's salary, OK?