The WebWare molecules this month are from the article "Photochemotherapy: Light-Dependent Therapies in Medicine" by Edward P. Zovinka and Danielle R. Suneri. The first is a simple porphine, illustrating the ubiquitous four-nitrogen macrocycle, while the second is the protoporphyrin found in heme systems.
In addition to the static image, two fully
manipulable versions (Jmol, MDLChime)
of these molecules appear below. (The Jmol
versions may take a few extra seconds to
load, based on the speed of your Internet
connection.)