| Label | Id | |
|---|---|---|
| 1918 influenza pandemic | http://id.nlm.nih.gov/mesh/2021/D064149 | |
| 1918 Spanish flu pandemic | http://id.nlm.nih.gov/mesh/2021/D064149 | |
| 1,9-Bis(4-hydroxy-3-methoxyphenyl)-2,7-nonadiene-4,6-dione | http://id.nlm.nih.gov/mesh/2021/D003474 | |
| 19. century | http://id.nlm.nih.gov/mesh/2021/D049672 | |
| 1,9-Dihydro-9-b-D-ribofuranosyl-6H-Purin-6-one | http://id.nlm.nih.gov/mesh/2021/D007288 | |
| 1,9-Dihydro-9-beta-delta-ribofuranosyl-6H-purin-6-one | http://id.nlm.nih.gov/mesh/2021/D007288 | |
| 1,9-Dihydro-9-beta-D-ribofuranosyl-6H-purin-6-one | http://id.nlm.nih.gov/mesh/2021/D007288 | |
| 1-(9-fluorenyl)methyl chloroformate | http://id.nlm.nih.gov/mesh/2021/C054007 | |
| 19-iodocholesterol | http://id.nlm.nih.gov/mesh/2021/D015071 | |
| 1,9-Nonanedioate | http://id.nlm.nih.gov/mesh/2021/C010038 | |
| 1,9-Nonanedioic acid | http://id.nlm.nih.gov/mesh/2021/C010038 | |
| 19-Nor-17-alpha-ethynyl-17-beta-hydroxy-4-androsten-3-one | http://id.nlm.nih.gov/mesh/2021/D009640 | |
| 19-Nor-17alpha-ethynyl-17beta-hydroxy-4-androsten-3-one | http://id.nlm.nih.gov/mesh/2021/D009640 | |
| 19-Nor-17-alpha-ethynylandrosten-17-beta-ol-3-one | http://id.nlm.nih.gov/mesh/2021/D009640 | |
| 19-Nor-17alpha-ethynylandrosten-17beta-ol-3-one | http://id.nlm.nih.gov/mesh/2021/D009640 |
