Robuta

https://www.wikidata.org/wiki/Q45158122 Simple trimerization of 2,3-butanedione yielding a selective reagent for the modification of... scientific article published in March 1968 https://webbook.nist.gov/cgi/inchi?ID=C93914&Mask=4 1,3-Butanedione, 1-phenyl- phenyl