porphobilinogen
/ˌpɔːfəʊbʌɪˈlɪnədʒ(ə)n/Biochemistry
noun
A colourless, soluble, solid compound which is a metabolic precursor of porphyrins, is excreted in the commoner forms of porphyria, and is a substituted pyrrole; 5-aminomethyl-4-carboxymethyl-1H-pyrrole-3-propanoic acid, C10H14N2O4.
Origin
1930s; earliest use found in Chemical Abstracts. From German Porphobilinogen from Porphobilin + -ogen.