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[Studies on chemical constituents of Clerodendrum bungei].

Guijie Zhang, Lumei Dai, Bin Zhang, Yongli Zhang, Heng‐Shan Wang, Dong Liang

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Abstract

Ten compounds were isolated from the 95% aqueous EtOH extract of Clerodendrum bungei by a combination of various chromatographic techniques including column chromatography over silica gel, Sephadex LH-20, MCI, ODS, and semi-preparative HPLC. Their structures were elucidated as 11,12,16S-trihydroxy-7-oxo-17(15→16),18(4→3)-diabeo-abieta-3,8,11,13-tetraen-18-oic acid (1), 12S*,13R*-dihydroxy-9-oxo-octadeca-10(E)-enoic acid (2), clerodenoside A (3), trichotomoside (4), glycosmisic acid (5), 4'-O-methylscutellarein (6), neroplomacrol (7), butylitaconic acid (8), hexylitaconic acid (9), p-hydroxybenzonic acid (10) by their physicochemical properties and spectroscopic data. Compounds 1 and 2 are new natural products, while compounds 7-10 were obtained from the genus Clerodendrum for the first time, and compounds 3, 5, 6 were isolated from this plant for the first time.

About this research paper

What this paper is about

Ten compounds were isolated from the 95% aqueous EtOH extract of Clerodendrum bungei by a combination of various chromatographic techniques including column chromatography over silica gel, Sephadex LH-20, MCI, ODS, and semi-preparative HPLC. Their structures were elucidated as 11,12,16S-trihydroxy-7-oxo-17(15→16),18(4→3)-diabeo-abieta-3,8,11,13-tetraen-18-oic acid (1), 12S*,13R*-dihydroxy-9-oxo-octadeca-10(E)-enoic acid (2), clerodenoside A (3), trichotomoside (4), glycosmisic acid (5), 4'-O-methylscutellarein (6), neroplomacrol (7), butylitaconic acid (8), hexylitaconic acid (9), p-hydroxybenzonic acid (10) by their physicochemical properties and spectroscopic data. Compounds 1 and 2 are new natural products, while compounds 7-10 were obtained from the genus Clerodendrum for the first time, and compounds 3, 5, 6 were isolated from this plant for the first time.

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Available abstract

Ten compounds were isolated from the 95% aqueous EtOH extract of Clerodendrum bungei by a combination of various chromatographic techniques including column chromatography over silica gel, Sephadex LH-20, MCI, ODS, and semi-preparative HPLC. Their structures were elucidated as 11,12,16S-trihydroxy-7-oxo-17(15→16),18(4→3)-diabeo-abieta-3,8,11,13-tetraen-18-oic acid (1), 12S*,13R*-dihydroxy-9-oxo-octadeca-10(E)-enoic acid (2), clerodenoside A (3), trichotomoside (4), glycosmisic acid (5), 4'-O-methylscutellarein (6), neroplomacrol (7), butylitaconic acid (8), hexylitaconic acid (9), p-hydroxybenzonic acid (10) by their physicochemical properties and spectroscopic data. Compounds 1 and 2 are new natural products, while compounds 7-10 were obtained from the genus Clerodendrum for the first time, and compounds 3, 5, 6 were isolated from this plant for the first time.

Key concepts: Sephadex, Chemistry, Chromatography, Chemical constituents, Silica gel, Column chromatography, High-performance liquid chromatography, Aqueous solution

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