Oleanane Saponins in “Kancolla”, a Sweet Variety of Chenopodium quinoa

Seven triterpenoid saponins were isolated from the seeds of “kancolla”, a sweet variety of Chenopodium quinoa. Their structures were phytolaccagenic acid 3-O-[α-l-arabinopyranosyl-(1‘ ‘→3‘)-β-d-glucuronopyranosyl]-28-O-β-d-glucopyranoside, oleanolic acid 3-O-[β-d-glucopyranosyl-(1‘ ‘→3‘)-α-l-arabinopyranosyl]-28-O-β-d-glucopyranoside, hederagenin 3-O-[β-d-glucopyranosyl-(1‘ ‘→3‘)-α-l-arabinopyranosyl]-28-O-β-d-glucopyranoside, phytolaccagenic acid 3-O-[β-d-glucopyranosyl-(1‘ ‘→3‘)-α-l-arabinopyranosyl]-28-O-β-d-glucopyranoside, oleanolic acid 3-O-[β-d-glucuronopyranosyl]-28-O-β-d-glucopyranoside, oleanolic acid 3-O-[α-l-arabinopyranosyl-(1‘ ‘→3‘)-β-d-glucuronopyranosyl]-28-O-β-d-glucopyranoside, and the new compound serjanic acid 3-O-[β-d-glucopyranosyl-(1‘ ‘→3‘)-α-l-arabinopyranosyl]-28-O-β-d-glucopyranoside (1). The structure of 1 was characterized on the basis of spectroscopic and chemical evidence.