| Label | Id | |
|---|---|---|
| pyridazinone | http://purl.obolibrary.org/obo/CHEBI_26414 | |
| pyridazinones | http://purl.obolibrary.org/obo/CHEBI_26414 | |
| pyridines | http://purl.obolibrary.org/obo/CHEBI_26421 | |
| pyrrolecarboxylate | http://purl.obolibrary.org/obo/CHEBI_26452 | |
| pyrrolecarboxylates | http://purl.obolibrary.org/obo/CHEBI_26452 | |
| pyrroles | http://purl.obolibrary.org/obo/CHEBI_26455 | |
| pyrrolidine-2-carbonyl | http://purl.obolibrary.org/obo/CHEBI_26274 | |
| quinate | http://purl.obolibrary.org/obo/CHEBI_26490 | |
| quinhydrone | http://purl.obolibrary.org/obo/CHEBI_26491 | |
| quinolines | http://purl.obolibrary.org/obo/CHEBI_26513 | |
| quinolizidines | http://purl.obolibrary.org/obo/CHEBI_26516 | |
| quinuclidines | http://purl.obolibrary.org/obo/CHEBI_26518 | |
| rac-(2R)-1-phenylpropan-2-amine | http://purl.obolibrary.org/obo/CHEBI_2679 | |
| rac-amphetamine | http://purl.obolibrary.org/obo/CHEBI_2679 | |
| racemomycins | http://purl.obolibrary.org/obo/CHEBI_26789 |