Eupteleasaponin VI

CAS Registry Number: 290809-37-9

Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Oleanene Type – Eupteleogenin

Biological source: Euptelea polyandra [1]

C₄₇H₇₂O₁₈: 924.471

Mp: 184–187°C [1]

[α] ²⁵_D + 46.8° (c 0.1, MeOH) [1]

IR (KBr) ν_max cm⁻¹: 3453, 1775, 1658, 1055 [1]

HR-FAB-MS m/z: 947.4616 [1]

¹ H NMR (500 MHz, J/Hz, C₅D₅N): 0.90, 1.09, 1.12, 1.18, 1.23 (s, CH₃-25, 26, 24, 27, 23), 2.33 (dd-like, H-18), 3.03 (brs, H-11), 3.14 (d-like, H-12), 3.38 (dd-like, H-3), 4.73 (m, H₂-29)

β-D-Glcp: 4.80 (d-like, H-1)

β-D-Glcp′: 5.08 (d, J = 7.0, H-1)

α-L-Rhap: 6.36 (brs, H-1), 1.65 (d, J = 5.4, CH₃-6) [1]

¹³ C NMR (125 MHz, C₅D₅N): [1]

Table 1

C-1	38.8	C-19	34.7	Glc-1	104.9
2	26.4	20	147.1	2	77.1
3	88.4	21	30.2	3	89.3
4	39.6	22	22.0	4	69.9
5	55.3	23	27.7	5	77.8
6	17.8	24	16.5	6	62.2
7	31.4	25	17.4	Rha-1	101.6
8	41.7	26	20.7	2	72.2
9	51.1	27	18.9	3	72.4
10	36.5	28	178.2	4	73.8
11	52.8	29	109.9	5	69.8
12	57.2			6	18.5
13	87.0			Glc′-1	104.0...