A Triterpene and A Phytosterol from Rhynchosia Minima

Abou Hassan, Tereasa M. Ghabrial, Magdi A. El Sayed, Soleiman E. Helaly, Eman Abdelrady and Abou El-Hamd H. Mohamed
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Abou Hassan: Aswan University
Tereasa M. Ghabrial: Aswan University, Egypt
Magdi A. El Sayed: Aswan University, Egypt
Soleiman E. Helaly: Aswan University, Egypt
Eman Abdelrady: Aswan University, Egypt
Abou El-Hamd H. Mohamed: Aswan University, Egypt

European Journal of Biology and Biotechnology, 2020, vol. 1, issue 5

Abstract: The Chemical examination of the n-hexane extract of Rhynchosia minima results the separation of two compounds. To separate these compounds, the dried powder of Rhynchosia minima was succumbed to hot extraction with n-hexane and submitted to chromatography. Mass spectra for the separated compounds appeared their molecular formula which was C30H50O for compound 1 and C29H48O for compound 2. In the 1H-NMR range of compound 1, H-3 proton revealed as a triplet of a double doublet (tdd) at δ 3.13, H-29 protons give two multiplets at δ 4.50 and δ 4.62 and seven methyl protons showed up at δ 27.46, 15.34, 16.09, 15.99, 14.55, 18 and 19.31. In the 1H-NMR range of compound 2, H-3 proton revealed as a triplet of a double doublet (tdd) at δ 3.45, olefinic proton H-6 revealed as a multiplet at δ 5.28 and six methyl protons showed up at δ 12.18, 19.3, 18.97, 21.02, 21.09 and 12.04. From the physical, chemical and spectral characteristics, compound 1 and 2 were distinguished as Lupeol and Stigmasterol.

Keywords: Rhynchosia minima; triterpene; sterol; Structure elucidation (search for similar items in EconPapers)
Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:epw:ejbio0:v:1:y:2020:i:5:id:17090

DOI: 10.24018/ejbio.2020.1.5.90

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