http://nopr.niscpr.res.in/handle/123456789/21477 2026-10-09T12:04:01Z http://nopr.niscpr.res.in/handle/123456789/21668 Title: Components from whole plant of <i>Phyllanthus amarus </i>Linn Authors: Ahmad, Bahar; Alam, Tanveer Abstract: The whole plant of <i>Phyllanthus amarus </i>Linn. has afforded new <i>seco</i>sterols<i> </i>named as amarosterol-A characterized as 13,14-<i>seco</i>-stigma 5(6), 14(15)-diene-3-α-ol <b>1</b>, and amarosterol-B characterized as 13 ,14-<i>seco-stigma </i>9(11), 14(15)-diene-3-α-ol <b>2</b>. Their structures have been elucidated on the basis of spectral and chemical studies. Page(s): 1786-1790 2003-07-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/21667 Title: Terpenoid and lipid constituents from <i>Artemisia annua</i>^† Authors: Tewari, Amit; Bhakuni, Rajendra Singh Abstract: Two new compounds, a bisnor cadinane 3α, 5β-dihydroxy-4α,11-epoxybisnor cadinane <b>1</b> and the other lipid constituent methyl-11, 12,15-trihydroxy-13(14)-octadecanoate <b>3</b> have been isolated from the leaves of <i>Artemisia annua. </i>Their structures have been established on the basis of their spectral and chemical studies. Page(s): 1782-1785 2003-07-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/21666 Title: Synthesis and antibacterial activity of amoenylin, a metabolite of <i>Dendrobium</i> <i>amoenum</i>^† Authors: Venkateswarlu, Somepalli; Ramachandra, Marellapudi S.; Subbaraju, Gottumukkala V Abstract: Amoenylin <b>6</b>, a dihydrostilbene from <i>Dendrobium amoenum </i>has been synthesised from sy ringaldehyde <b>1</b>, in three steps with an<i> </i>overall yield of 40%. The spectral data of synthetic <b>6</b> are in good<i> </i>agreement with those of natural product. Amoenylin <b>6</b> shows<i> </i>weak antibacterial activity. Page(s): 1779-1781 2003-07-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/21665 Title: A rapid and efficient method for acetylation of phenols with acetic anhydride catalysed by TiO₂/SO₄^2- solid superacid Authors: Ma, Yan-Ran; Jin, Tong-Shou; Wang, Zhen-Hua; Li, Tong-Shuang Abstract: A rapid and efficient method for acetylation of phenols with acetic anhydride in the presence of TiO₂/SO₄^2- solid superacid at room or at reflux temperature in excellent yield is described. Page(s): 1777-1778 2003-07-01T00:00:00Z