| # | Species | Formula |
| 6550 | Cerium complex, CCDC: SOZLUO (Geo) | C60H126O6Ce2 | |
| 6551 | Cerium complex, CCDC: XEXCUY (Geo) | C56H48N6O14Ce2 | |
| 6552 | Cerium complex, CCDC: CUMCIW (Geo) | C16H28O18Ce2 | |
| 6553 | Cerium complex, CCDC: BABZIN (Geo) | C42H34O20Cl12Ce2 | |
| 6554 | Praseodymium complex, CCDC: GIWWEO (Geo) | C18H27N9Pr | |
| 6555 | Praseodymium complex, CCDC: NPYPRP10 (Geo) | C48H36N12Pr | |
| 6556 | Praseodymium complex, CCDC: KOBRUO (Geo) | C64H32N16Pr | |
| 6557 | Praseodymium complex, CCDC: RUGNOW (Geo) | C27H30B3N18Pr | |
| 6558 | Praseodymium complex, CCDC: MIPTEK (Geo) | C27H27N4O3Pr | |
| 6559 | Praseodymium complex, CCDC: POGWIR (Geo) | C44H67O5Pr | |
| 6560 | Praseodymium complex, CCDC: YOTYUB (Geo) | C45H82N9O5Pr | |
| 6561 | Praseodymium complex, CCDC: PELGOC (Geo) | C27H29N2O6Pr | |
| 6562 | Praseodymium complex, CCDC: VELRUZ (Geo) | C16H38N2O7Pr | |
| 6563 | Praseodymium complex, CCDC: ZULRED (Geo) | C34H34N5O7Pr | |
| 6564 | Praseodymium complex, CCDC: KAWBIT (Geo) | C31H30N8O7Pr | |
| 6565 | Praseodymium complex, CCDC: CAZGUF (Geo) | C15H25O8Pr | |
| 6566 | Praseodymium complex, CCDC: BUVWIY01 (Geo) | H18O9Pr | |
| 6567 | Praseodymium complex, CCDC: BAFYOX (Geo) | C20H20N5O9Pr | |
| 6568 | Praseodymium complex, CCDC: KAHGEF (Geo) | C16H18N7O9Pr | |
| 6569 | Praseodymium complex, CCDC: ECABAL (Geo) | C24H16N7O9Pr | |
| 6570 | Praseodymium complex, CCDC: FEDYAO (Geo) | C18H33N6O10Pr | |