Structures of Gibberellins A39, A48, A49 and a New Kaurenolide in Cucurbita pepo L. |
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| Authors: | Hiroshi Fukui Ryoichi Nemori Koichi Koshimizu Yoshimitsu Yamazaki |
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| Affiliation: | Department of Food Science and Technology, Faculty of Agriculture, Kyoto University, Kyoto 606, Japan |
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| Abstract: | The structures of three new gibberellins A30, A48 and A49 and a new kaurenolide, isolated from seeds of Cucurbita pepo L., were elucidated. The structures of GA39, GA48 and GA49 were shown to be ent-3α,12β-dihydroxygibberell-16-ene-7,19,20-trioic acid (1), ent-2α,3α,10,12α-tetrahydroxy-20-norgibberell-16-ene-7,19-dioic acid 19,10-lactone (5) and the epimer at C–12 of GA48 (8), respectively. The kaurenolide was shown to have the structure: ent-6β,7α,12β-trihydroxykaur-16-en-19-oic acid 19,6-lactone (14). |
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| Keywords: | carboxin carboxamide fungicide succinate dehydrogenase |
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