5,10,15,20-Tetra(4-pyridyl)porphyrin
https://www.polycil.co.uk/shop/fm-3b-t2222-5101520-tetra-4-pyridyl-porphyrin-39726
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5,10,15,20-Tetra(4-pyridyl)porphyrin 1g : Porphyrin with pyridyl substituents for supramolecular chemistry and metal coordination.
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