Novel dibasic organic acid diesters of the dienol form of biacetyl and {HEAD ~ methods} for {TAIL ~ their preparation} are provided 
for
Novel dibasic organic acid diesters of the dienol form of biacetyl and { HEAD ~ methods } for { TAIL ~ their preparation } are provided
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH