106562-37-2 21,22,23,24-Tetraazapentacyclo(16.2.1.1(2,5).1(8,11).1(12,15))tetracosa-1,3,5,7,9,11(23),12,14,16,18(21),19-undecaene, 4,9,14,19-tetrapropyl- Tetra-n-propylporphycene