Four new triterpene saponins were isolated from the methanol extract of the aerial parts of Alternanthera repens. Their structures have been elucidated using a combination of 1D and 2D NMR techniques as 2 alpha,3 beta-dihydroxyurs-12,20(30)-dien-28 oic acid 3-O-{O-beta-D-glucopyranosyl-(1 --> 2)-O-alpha-L-arabinopyranosyl-(1 --> 2)-O-[beta-D-xylopyranosyl-(1 --> 3)]beta-D-glucopyranoside}; 2 alpha,3 beta-dihydroxyurs-12,20(30)-dien-28 oic acid 3-O-{O-beta-D-quinovopyranosyl-(1 --> 2)-O-alpha-L-arabinopyranosyl-(1 --> 2)-O-[beta-D-xylopyranosyl-(1 --> 3)]beta-D-glucopyranoside}; 2 alpha,3 beta-dihydroxyurs-12,20(30)-dien-28 oic acid 3-O-{O-alpha-L-arabinopyranosyl-(1 --> 2)-O-[beta-D-xylopyranosyl-(1 --> 3)]beta-D-glucopyranoside}; 2 alpha,3 beta-dihydroxyurs-12,20(30)-dien-28 oic acid 3-O-{O-beta-D-xylopyranosyl-(1 --> 3)-beta-D-glucopyranoside}.
Triterpene saponins from Alternanthera repens / R. Sanoko, G. Speranza, C. Pizza, N. De Tommasi. - In: PHYTOCHEMISTRY. - ISSN 0031-9422. - 51:8(1999 Aug), pp. 1043-1047. [10.1016/S0031-9422(99)00046-1]
Triterpene saponins from Alternanthera repens
G. SperanzaSecondo
;
1999
Abstract
Four new triterpene saponins were isolated from the methanol extract of the aerial parts of Alternanthera repens. Their structures have been elucidated using a combination of 1D and 2D NMR techniques as 2 alpha,3 beta-dihydroxyurs-12,20(30)-dien-28 oic acid 3-O-{O-beta-D-glucopyranosyl-(1 --> 2)-O-alpha-L-arabinopyranosyl-(1 --> 2)-O-[beta-D-xylopyranosyl-(1 --> 3)]beta-D-glucopyranoside}; 2 alpha,3 beta-dihydroxyurs-12,20(30)-dien-28 oic acid 3-O-{O-beta-D-quinovopyranosyl-(1 --> 2)-O-alpha-L-arabinopyranosyl-(1 --> 2)-O-[beta-D-xylopyranosyl-(1 --> 3)]beta-D-glucopyranoside}; 2 alpha,3 beta-dihydroxyurs-12,20(30)-dien-28 oic acid 3-O-{O-alpha-L-arabinopyranosyl-(1 --> 2)-O-[beta-D-xylopyranosyl-(1 --> 3)]beta-D-glucopyranoside}; 2 alpha,3 beta-dihydroxyurs-12,20(30)-dien-28 oic acid 3-O-{O-beta-D-xylopyranosyl-(1 --> 3)-beta-D-glucopyranoside}.
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