1986
DOI: 10.1007/bf00598301
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Withasteroids ofPhysalis VI.1H and13C NMR spectra of withasteroids ixocarpalactone A and ixocarpanolide

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Cited by 6 publications
(2 citation statements)
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“…The compounds being eluted during this time period exhibited only end absorption in their UV spectra, but prominent MS ions in this region of the chromatogram occurred at m/z 469 (R t 11.9 min), 471 (t R 12.4 min), 487 (t R 11.0 min), and 519 (t R 11.3 min). Based on the MS and UV data obtained from this dereplication experiment, it appeared most likely that the QR-active compounds present in the EtOAc extract of P. philadelphica belonged to the withanolide group, which are known to occur in this species (Subramanian and Sethi, 1973;Tursunova et al, 1977;Kirson et al, 1979;Ascher et al, 1980;Abdullaev et al, 1986). Repeated silica gel flash column chromatography of fraction B led to the isolation of two major withanolides, the novel 2,3-dihydro-3-methoxywithaphysacarpin (1) and the known compound withaphysacarpin (2).…”
Section: Resultsmentioning
confidence: 97%
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“…The compounds being eluted during this time period exhibited only end absorption in their UV spectra, but prominent MS ions in this region of the chromatogram occurred at m/z 469 (R t 11.9 min), 471 (t R 12.4 min), 487 (t R 11.0 min), and 519 (t R 11.3 min). Based on the MS and UV data obtained from this dereplication experiment, it appeared most likely that the QR-active compounds present in the EtOAc extract of P. philadelphica belonged to the withanolide group, which are known to occur in this species (Subramanian and Sethi, 1973;Tursunova et al, 1977;Kirson et al, 1979;Ascher et al, 1980;Abdullaev et al, 1986). Repeated silica gel flash column chromatography of fraction B led to the isolation of two major withanolides, the novel 2,3-dihydro-3-methoxywithaphysacarpin (1) and the known compound withaphysacarpin (2).…”
Section: Resultsmentioning
confidence: 97%
“…Previous phytochemical work on P. philadelphica Lam., formerly known as P. ixocarpa Brot. (Waterfall, 1967), has resulted in the isolation of several withanolides, including ixocarpalactones A and B (Kirson et al, 1979), ixocarpanolide (Abdullaev et al, 1986), physalin B (Subramanian and Sethi, 1973), and withaphysacarpin (Subramanian and Sethi, 1973). Withanolides have a limited distribution, having been first isolated from Withania somnifera (L.) Dunal, and subsequently being found primarily in 12 genera of the Solanaceae (Glotter, 1991;Raffauf et al, 1991;Ray and Gupta, 1994).…”
Section: Introductionmentioning
confidence: 99%