Ilexsaponin B₂

CAS Registry Number: 108906-69-0

Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Ursene Type – Pomolic Acid

Biological source: Ilex pubescens [1]

C₄₇H₇₆O₁₇: 912.508

Mp: 240–243°C (EtOH) [1]

[α] ²⁰_D −15.3° (c 1.20, C₅H₅N) [1]

IR (nujol) ν_max cm⁻¹: 3300, 1685 [1]

¹ H NMR (100 MHz, J/Hz, C₅D₅N): 0.86, 1.08, 1.12 (d, J = 9.0), 1.35, 1.35, 1.43, 1.76, (CH₃ × 7), 3.30 (s, H-18), 5.08 (s, HO-19), 5.56 (brt, H-12)

β-D-Xylp: 4.91 (d, J = 5.4, H-1); β-D-Glcp: 5.83 (d, J = 7.1, H-1); α-L-Rhap: 6.41 (brs, H-1), 1.79 (d, J = 6.1, CH₃-6) [1]

¹³ C NMR (25.15 MHz, C₅D₅N): [1]

Table 1

C-1	38.8	C-17	47.9	Xyl-1	105.9
2	27.0	18	47.4	2	79.0
3	89.7	19	73.4	3	77.8
4	39.7	20	43.0	4	71.3
5	56.0	21	23.9	5	66.6
6	18.6	22	32.5	Glc-1	102.3
7	33.5	23	28.4	2	79.4
8	40.2	24	15.4	3	79.0
9	47.7	25	16.1	4	72.3
10	37.0	26	17.3	5	78.5
11	24.9	27	24.4	6	63.3
12	127.3	28	180.7	Rha-1	102.0
13	139.5	29	29.8	2	72.6
14	42.1	30	16.7	3	72.6
15	29.2			4	74.3
16	26.6			5	69.5...