mesoporphyrin

[ mĕz′ō-pôrfə-rĭn ]

n.

Any of various porphyrin compounds produced from a protoporphyrin by the addition of hydrogen to the double bond of each of the vinyl groups.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.