Publisher: Chemical Society of Nigeria

A Triterpenoid From Stem Bark of Sterculia Setigera Del

T. A. Tor-anyiin, M. U. Akpuaka
KEYWORDS: Lupeol, sterculia setigera, ethnomedicine, phytochemical screening

ABSTRACT:

Sterculia setigera Del is a plant used in ethnomedicine. Petroleum ether (40-600C) extract of its stem bark was obtained via maceration at room temperature. On recrystallization from methanol-dichloromethane (MeOH-DCM), it gave a colourless solid, 0.5% yield, mp 209-2110C. Phytochemical screening together with tlc indicated presence of triterpenoids. Spectroscopic analysis shows IR: 3328, 1640 cm-1; 13C-NMR: 151.05 (C20), 109.44 (C19);1H-NMR: 4.67(s), 4.55(s), 1.67(s), 0.81-1.37(s), 3.19(d), and 2.38(m), and MS:[M+ M/Z=426.4]. These analyses together with literature reports led to the identification of a triterpenoid lupeol, [3-hydroxy-20(29)-lupene] (C30H50O).


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