The molecular formula C4H4O may refer to: thumb|Theoretical isomers of C4H4O showing tautomerisation Butynone 1,3-Butadienal Cyclobutenone Furan
The molecular formula C4H4O may refer to: thumb|Theoretical isomers of C4H4O showing tautomerisation Butynone 1,3-Butadienal Cyclobutenone Furan
Category:Molecular formulas
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).