pyrroporphyrin

noun

pyr·ro·porphyrin | \ ¦pi(ˌ)rō+\

Definition of pyrroporphyrin

: a dark red crystalline pigment C₃₂H₃₆N₄O₂ with a violet metallic luster that is the lower homologue of phylloporphyrin and that differs from most porphyrins in being a hepta-substituted derivative of porphin rather than an octa-substituted one

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