GC and GC-MS Analysis of Head-space Volatiles by Tenax GC Trapping Techniques |
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| Authors: | Takashi Tsugita Toru Imai Yoshitaka Doi Tadao Kurata Hiromichi Kato |
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| Affiliation: | 1. Department of Agricultural Chemistry, University of Tokyo, Bunkyo-ku, Tokyo, Japan;2. National Food Research Institute, Tsukuba-gun, Ibaragi-ken, Japan |
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| Abstract: | New ingenol-esters were isolated from leaves of Euphorbia cotinifolia L, (Euphorbiaceae) as piscicidal constituents. On the basis of spectral properties, the structures were established as 3-O-propionyl-20-O-(S)-(2′-methyl)butyryl-ingenol (1), 20-O-isobutyryl-ingenol (2), 3-O-propionyl-20-O-isobutyryl-ingenol (3), and 3, 20-O-di-isobutyryl-ingenol (4). |
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