... COMM., 1981 The Biosynthesis of Asperlactone : Incorporation Studies with [2J3C,2 -2H,]Acetate By MARY 3. GARSON and JAMES STAUNTON ( University Chemical Laboratovy, Lensfield Road, Cambridge CB2 1EW) Summary The C-7 methyl group of asperlactone (1) RECENTLY, we showed that asperlactone (1) incorporates ... Both C-8 and C-3 show flanking satellites [J(13C-13C) 64 Hz] resulting from the presence of 13C at the adjacent carbon. ...