Structural formula of 2,3-butanedione trimer
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<span class="int-own-work" lang="en">Own work</span> mittels: ChemDraw Professional 16.0, Sources: <a rel="nofollow" class="external autonumber" href="https://pubchem.ncbi.nlm.nih.gov/compound/193527#section=Top">[1]</a>