هیدروکسی‌متیل‌بیلان

Also known as (hydroxymethyl)bilane, 3,8,13,18-tetrakis(carboxymethyl)-5,10,15,22,23,24-hexahydro-19-(hydroxymethyl)-21H-biline-2,7,12,17-tetrapropanoic acid

Hydroxymethylbilane, also known as preuroporphyrinogen, is an organic compound that occurs in living organisms during the synthesis of porphyrins, a group of critical substances that include haemoglobin, myoglobin, and chlorophyll. The name is often abbreviated as HMB.