Ten C-13-hydroxylated gibberellins (GA3, GA17, GA19, GA20, GA32, GA44, GA86, GA87, GA95 and GA95 isolactone) and two C-13-deoxy-GAs (GA25 and GA30) were identified in immature seeds of sour cherry (Prunus cerasus L. cv. Montmorency) by GC-mass spectrometry. GA95 is a new GA whose structure was determined to be 1, 2-didehydroGA20 by GC-mass spectral comparison with an authentic sample, synthesized from GA3. In ...