1,721,010 research outputs found
SECOIRIDOIDS FROM OLEA-EUROPAEA
No full textThree new secoiridoids have been isolated from the leaves of Olea europaea along with the previously reported. The compounds were identified by spectral means
Studies on the sex pheromone of Dacus oleae. Analysis of the substances contained in the rectal gland
No full text17 substances contained in the rectal glands of Dacus oleae have been, identified by GC-MS techniques. The synthesis of 3 isomeric spiroketals allows us definitively to assign the structure of 1,7-dioxaspiro-[5,5]-undecane to the most volatile compound
600 MHz H-1 and C-13 NMR full assignments of two saponins from Nothapodytes foetida
No full textThe application of one- and two-dimensional nuclear magnetic resonance techniques to the structure elucidation of two saponins from Nothapodytes foetida is reported, Detailed structural information about the sapogenin, protobassic acid, and the oligosaccharidic chains, including sugar sequence and position of glycosidation, is provided
A new approach to 3β,11α,15α-trihydroxy-5α-cholestan-7-one, a key intermediate in the synthesis of the steroidal moiety of oogoniols
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TRITERPENES FROM THE FROND EXUDATE OF THE FERN NOTHOLAENA-GREGGII
No full textAlong with known flavonoid aglycones, the frond exudate of N. greggii yielded two ocotillol-type dammarane triterpenoids, whose structure was established by chemical reactions, spectral data and X-ray analysis
Stereochemical course of the catalytic reduction and of the acidic isomerization of 14β steroids. Synthesis of Δ8-14β and 8α,9α,14β steroids
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