4,4',4'',4'''-Porphyrin-5,10,15,20-tetrayltetrakis(1-methylpyridinium) tetraiodide;pyridinium, 4,4',4'',4'''-(21H,23H-porphine-5,10,15,20-tetrayl)tetrakis[1-methyl-, iodide (1:4)
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