| Label | Id | |
|---|---|---|
| C2(2-) | http://purl.obolibrary.org/obo/CHEBI_30081 | |
| [C2](2-) | http://purl.obolibrary.org/obo/CHEBI_30081 | |
| acetylenediide | http://purl.obolibrary.org/obo/CHEBI_30081 | |
| acetylide | http://purl.obolibrary.org/obo/CHEBI_30081 | |
| dicarbide(2-) | http://purl.obolibrary.org/obo/CHEBI_30081 | |
| ethynediide | http://purl.obolibrary.org/obo/CHEBI_30081 | |
| acetylide dianion | http://purl.obolibrary.org/obo/CHEBI_30081 | |
| acetylide ion | http://purl.obolibrary.org/obo/CHEBI_30081 |
