Abstract
Two new triterpenoid saponins, 3-O-{[ β-ᴅ-4-O-sulfonylglucopyranosyl-(1→3)]-α-ʟ-ara-binopyranosyl}-ursolic acid -28-O-[β-ᴅ-glucopyranosyl] ester (indicasaponin C) and 3-O-{[β-ᴅ-4-O-sulfonylglucopyranosyl-(1→3)]-[β-ᴅ-xylopyranosyl-(1→2)]-α-ʟ-arabinopyranosyl}-ursolic acid -28-O-[β-ᴅ-glucopyranosyl] ester (indicasaponin D) have been isolated from Fagonia indica. The structures were determined primarily by NMR spectroscopy. The assignment of NMR signals was performed by means of 1H -1H COSY, NOESY, ROESY, TOCSY, HMQC and HMBC experiments.
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