| Label | Id | |
|---|---|---|
| urea-1-carboxylic acid | http://purl.obolibrary.org/obo/CHEBI_9889 | |
| 2-[(1S,3S,4aS,9aR)-6-amino-1-(hydroxymethyl)-3,4,4a,9a-tetrahydro-1H-pyrano[3,4-b]benzofuran-3-yl]acetic acid methyl ester | http://purl.obolibrary.org/obo/CHEBI_98938 | |
| uracil nitrogen mustard | http://purl.obolibrary.org/obo/CHEBI_9884 |