porphycene

trans-Porphycene

21,22,23,24-Tetraazapentacyclo[16.2.1.12,5.18,11.112,15]tetracosa-1,3,5,7,9,11(23),12,14,16,18(21),19-undecaene

21,22,23,24-Tetraazapentacyclo[16.2.1.14,7.18,11.114,17]tetracosane-1,3,5,7,9,11(23),12,14,16,18(21),19-undecaene

21,22,23,24-Tetraazapentacyclo[16.2.1.12,5.18,11.112,15]tetracosane-1,3,5,7,9,11(23),12,14,16,18(21),19-undecaene