CCC1=C(c2cc3[n+]4c(cc5c(c(c6n5[Fe@@]47[n+]2c1cc8n7c(c6)c(c8C)CCC(=O)O)CCC(=O)O)C)[C@@](C3=O)(C)CC)C FE-(4-MESOPORPHYRINONE)-R-ISOMER FMI