TAILIEUCHUNG - Norisoprenoid, phenolic and steroidal constituents from Mallotus luchenensis
A C13-norisoprenoid malloluchenoside (1), two phenolics gallic acid (2) and corillagin (3), and two steroids daucosterol (4) and stigmast-5-enee-3-O-(6-O-octadecanoyl-β-Dglucopyranoside) (5) were isolated from the MeOH extract of Mallotus luchenensis. Their structures were elucidated on the basis of spectral and physicochemical data. Among which, 1 was isolated for the first time from the nature. | Journal of Chemistry, Vol. 47 (5), P. 558 - 562, 2009 NORISOPRENOID, PHENOLIC AND STEROIDAL CONSTITUENTS FROM MALLOTUS LUCHENENSIS Received 8 July 2008 NGUYEN HUU TOAN PHAN1, CHAU VAN MINH2, NGUYEN HAI DANG2, DINH THI THU THUY2, NGUYEN PHUONG THAO2, PHAN VAN KIEM2, VU KIM THU3, YVAN VANDER HEYDEN4 AND JOËLLE QUETIN-LECLERCQ5 1 Tay Nguyen Institute of Biology, Da Lat 2 Institute of Natural Products Chemistry, VAST, Vietnam 3 Hanoi University of Mining and Geology, Vietnam 4 Vrije Universiteit Brussel, Laarbeeklaan, 103 B-1090 Brussels, Belgium 5 Analytical Chemistry, Drug Analysis and Pharmacognosy Unit, Université Catholique de Louvain, Avenue E. Mounier, 72 B-1200 Brussels, Belgium ABSTRACT A C13-norisoprenoid malloluchenoside (1), two phenolics gallic acid (2) and corillagin (3), and two steroids daucosterol (4) and stigmast-5-enee-3-O-(6-O-octadecanoyl-β-Dglucopyranoside) (5) were isolated from the MeOH extract of Mallotus luchenensis. Their structures were elucidated on the basis of spectral and physicochemical data. Among which, 1 was isolated for the first time from the nature. Key words: Mallotus luchenensis, norisoprenoid, phenolic, steroid, malloluchenoside. I - INTRODUCTION Mallotus luchenensis is widely distributed in the Northern part of Vietnam. In particular, it has been found in Lang Son, Hoa Binh, Ha Nam, Ninh Binh provinces [1, 2]. Studies on the chemical constituents of the Mallotus genus revealed that flavonoids, phenolics and benzopyrans are the most common components [3 - 6]. In the course of our continuing studies for the chemical components of Mallotus species, we have isolated and identified five compounds including two steroids, two phenolics, and a new C13-norisoprenoid from M. luchenensis species. C13-norisoprenoids are well known as important aroma constituents of grape juices and wines. They were also found in the tea leaves as aroma 558 precursors [7] but rarely found in the Mallotus genus. This paper deals with the .
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