Arvenin I

CAS Registry Number: 65247-27-0

Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Glycosides of Aglycones of Cucurbitane Type – Cucurbitacin B

Biological source: Anagallis arvensis [1]

C₃₈H₅₆O₁₃: 720.372

Mp: 141–146°C [1]

[α] ²⁰_D + 40.6° (c 1.6, EtOH) [1]

UV λ ^EtOH_max nm (ε): 228 (10900) [1]

IR (KBr) ν_max cm⁻¹: 3400, 1720, 1690, 1630 [1]

¹ H NMR (100 MHz, J/Hz, CDCl₃): 5.75 (m, H-6), 0.96 (CH₃-18), 1.07 (CH₃-19), 1.27 (CH₃-26, 27), 6.52 (d, J = 16, H-23), 7.02 (d, J = 16, H-24), 1.35 (CH₃-28), 1.56 (CH₃-21), 1.44 (CH₃-29), 1.54 (CH₃-30), 2.02 (CH₃COO) [1]

¹³ C NMR (15 MHz, C₅D₅N): [1]

Table 1

C-1	35.0	C-16	70.8	Glc-1	104.0
2	78.2	17	59.6	2	75.6
3	211.3	18	21.8	3	78.2
4	48.5	19	20.4	4	71.4
5	140.8	20	79.8	5	78.2
6	120.4	21	19.9	6	62.6
7	24.2	22	204.0
8	42.9	23	122.5
9	48.9	24	150.0
10	34.4	25	79.8
11	212.7	26	26.3
12	49.1	27	26.6
13	51.0	28	25.3
14	51.5	29	28.7
15	46.1	30	18.9
		OCOCH3	169.7
			21.8

Pharm./Biol.: Show remarkable bitterness [1]