porphobilinogen
noun
por·pho·bi·lin·o·gen
ˌpȯr-fō-bī-ˈlin-ə-jən 
: a dicarboxylic acid C10H14N2O4 that is derived from pyrrole, that is found in the urine in acute porphyria, and that on condensation of four molecules yields uroporphyrin and other porphyrins
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“Porphobilinogen.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/porphobilinogen. Accessed 21 Apr. 2025.
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