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Gibberellin a 60 gibberellin a 61 and gibberellin a 62 partial synthesis and natural occurrence

Gibberellin a 60 gibberellin a 61 and gibberellin a 62 partial synthesis and natural occurrence

Journal of the Chemical Society Perkin Transactions I (3): 689-698

ent-1.alpha.,10,13-Trihydroxy-20-norgibberell-16-ene-7,19-dioic acid 19,10-lactone (GA60) and ent-1.alpha.,10-dihydroxy-20-norgibberell-16-ene-7,19-dioic acid 19,10-lactone (GA61) were prepared from GA3 and GA7, respectively, and are identical with 2 GA previously detected by GLC-mass spectrometry in developing grains of Triticum aestivum. ent-1.alpha.,10-Dihydroxy-20-norgibberella-2,16-diene-7,19-dioic acid 19,-10-lactone (GA62) was prepared from GA7 and is present in the grain of T. aestivum. GA61, and GA62 were detected in immature seed of Pyrus malus. Attempts to prepare a 4th putative GA4, detected in T. aestivum, were not successful.

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