This is Erythromycin's structure formula, as it is found on Wikipedia. It's a macrolide antibiotic used for people with an allergy to penicillin.
This is the 3D structure:
This is the 3D structure from a different perspective:
Nothing new, I know but I get most of my hits from people googling for such graphics. So here you go.What is new though is this little brain teaser. You'll find a jmol applet next to the structural formula. The applet contains 8 models you can switch in between with your right mouse button. One of them is the correct structure the other ones are diastereomeres. Maybe I am the only one who thinks this is fun. But if you do try it out let me know if you found the correct structure.
And why is there always a need for new antibiotics? Because little germs are succesfully beating big pharma over and over again. My alternative tree hugging side might like that but of course my rational side would rather stay healthy.
