porphin

noun
por·​phin | \ ˈpȯr-fən How to pronounce porphin (audio) \
variants: also porphine \ -​ˌfēn How to pronounce porphine (audio) \

Medical Definition of porphin

: a deep purple crystalline compound C20H14N4 that is made synthetically from pyrrole and formaldehyde, contains four pyrrole rings joined by =CH− groups so as to give a heterocyclic arrangement, and forms the essential skeletal structure of the porphyrins, heme, and chlorophyll

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