Saponins from Bran of Quinoa, Chenopodium quinoa WILLD. II

• Published in: Chemical & pharmaceutical bulletin Vol. 38; no. 2; pp. 375 - 377
• Main Authors: MIZUI, Fumie, KASAI, Ryoji, OHTANI, Kazuhiro, TANAKA, Osamu
• Format: Journal Article
• Language: English
• Published: Tokyo The Pharmaceutical Society of Japan 1990; Maruzen; Japan Science and Technology Agency
• Subjects: Atomic and molecular physics; Chenopodiaceae; Chenopodium quinoa; Exact sciences and technology; food resource; General molecular conformation and symmetry; stereochemistry; methyl spergulagenate; Molecular properties and interactions with photons; oleanene triterpene; Physics; phytolaccagenic acid; Properties of molecules and molecular ions; Quinoa; saponin; Pentacyclic compound; Molecular structure; Triterpene; Isolation; Experimental study; NMR spectrum; Ethylenic compound; Saponin
• ISSN: 0009-2363; 1347-5223
• DOI: 10.1248/cpb.38.375

Grains of Quinoa, Chenopodium quinoa have been used as a staple food in the Andes, South America. In a continuing study on saponin constituents of this plant, seven oleanane saponins were isolated from brans of the grains. Two of them were identified as known saponins of oleanolic acid, chikusetsusaponin IVa (10) from rhizomes of Panax spp. and quinoside D (12) from seeds of this plant, respectively. The other five compounds (7, 8, 9, 11 and 13) are new saponins, being designated as quinoa-saponins-6-10. The structures of these saponins were elucidated as follows : 7, 8 and 9, 3-O-[β-glucopyranosyl(1→2)-β-glucopyranosyl(1→3)-α-arabinopyranoside]-28-O-β-glucopyranoside of 30-O-methyl spergulagenate, oleanolic acid and phytolaccagenic acid, respectively; 11, hederagenin 3-O-β-glucuronide-28-O-β-glucopyranoside; and 13; hederagenin 3-O-β-xylopyranosyl(1→3)-β-glucuronide-28-O-β-glucopyranoside.