Definition for Revision history of "Porphyrin"

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  • (cur | prev) 17:38, 26 September 2011Duddy (Talk | contribs). . (1,754 bytes) (+1,754). . (Created page with "A porphyrin is an organic compound that contains four pyrrole rings. A pyrrole is a pentagon-shaped ring of four carbon atoms with a nitrogen atom at one corner (C<sub>4</sub>H<s...")