mesoporphyrin

noun
me·​so·​por·​phy·​rin | \ ˌmez-ō-ˈpȯr-fə-rən, ˌmēz-, ˌmēs-, ˌmes- How to pronounce mesoporphyrin (audio) \

Medical Definition of mesoporphyrin

: any one of the isomeric porphyrins C34H38N4O4 produced from protoporphyrin by reducing the vinyl groups to ethyl groups