| 706808-89-1 | Xte32xdx7N | C17H15NO5 |
| 852336-82-4 | Xalacom | C39H64N4O8S |
| 13994-18-8 | Xenon-125 | Xe |
| 13965-99-6 | Xenon-129 | Xe |
| 607393-55-5 | Xdkxolmrfoxrnm-uhfffaoysa-N | C19H19Br2F2N3 |
| 1260637-00-0 | Xddhrhfktnublq-uhfffaoysa-N | C11H19F2NO4 |
| 328242-77-9 | X3PJ4HD82G | C13H21NO2 |
| 227596-81-8 | Xanthobaccin A | C29H38N2O6 |
| 2061980-01-4 | Xmu-MP-1 | C17H16N6O3S2 |
| 15151-09-4 | Xenon-122 | Xe |
| 473839-18-8 | Xsu9yax3AA | C21H27ClFN3O4 |
| 484-75-3 | X4ZL775VA9 | C15H12O6 |
| 73123-79-2 | Xpn7ZQ5ewk | C8H12N2O3 |
| 782404-47-1 | XG2Jqx2jdj | C20H27NO2 |
| 108643-57-8 | Xantinol nicotinate, (R)- | C19H26N6O6 |
| 160845-06-7 | Xanthotoxol arabinoside | C16H14O8 |