| Label | Id | |
|---|---|---|
| Vanillic acid | http://purl.obolibrary.org/obo/CHEBI_30816 | |
| vanillic acid | http://purl.obolibrary.org/obo/CHEBI_30816 | |
| (2E)-3-(1H-imidazol-4-yl)acrylic acid | http://purl.obolibrary.org/obo/CHEBI_30817 | |
| (2E)-3-(1H-imidazol-4-yl)prop-2-enoic acid | http://purl.obolibrary.org/obo/CHEBI_30817 | |
| (E)-3-(1H-imidazol-4-yl)-2-propenoic acid | http://purl.obolibrary.org/obo/CHEBI_30817 | |
| Urocanic acid | http://purl.obolibrary.org/obo/CHEBI_30817 | |
| trans-urocanic acid | http://purl.obolibrary.org/obo/CHEBI_30817 | |
| (2Z)-3-(1H-imidazol-4-yl)prop-2-enoic acid | http://purl.obolibrary.org/obo/CHEBI_30818 | |
| (Z)-imidazole-4-acrylic acid | http://purl.obolibrary.org/obo/CHEBI_30818 | |
| cis-urocanic acid | http://purl.obolibrary.org/obo/CHEBI_30818 | |
| Gallic acid 3-monogallate | http://purl.obolibrary.org/obo/CHEBI_30814 |