... silica gel using hex-ane-EtOAc, mixtures of increasing polarity consisting of four kaurenoid carboxylic acids:(–)-kaur-16-en-19-oic acid (28), (–)-grandifloric acid, (–)-angeloylgrandifloric ... –53%, 10 –9M; 27, –48%, 10 –8M) and shoot (27, –24%, 10 –6M) androot growth (26, –27%, 10 –8M, 27, –22%, 10 –8M) of T. aestivum.All germacranolides tested possess an α-methylene-γ-lactone ... homogeneousactivity profile (31%, 10 –6; 39%, 10 –7M; 28%, 10 –8M; 25%, 10 –9M), and 42 which had the high-est values (30%, 10 –5M; 59%, 10 –7M; 24%, 10 –8M). The rest of the triterpenoid...