Compound 4

Reference work entry

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Taxonomy: Physicochemical and Pharmacological Properties of Triterpene Glycosides – Miscellaneous Glycosides – 25-Acetoxy-2β,3β,16α,20-tetrahydroxy-9-methyl-19-norlanosta-5-en-22-one

Biological source: Picrorhiza kurrooa [1]

C38H62O12: 710.424

Mp: 151–153°C [1]

UV λmax nm: 200, 230 [1]

FAB-MSm/z: 717 [M + Li]+, 657 [M + Li-HOAc]+ [1]

1H NMR (300 MHz, J/Hz, CD3OD): 1.75, 2.53 (ddd, H2-1), 4.29 (ddd, H-2), 3.69 (d, H-3), 5.67 (brd, H-6), 1.85 (ddd, Ha-7), 2.46 (brdd, Hb-7), 1.87 (brd, H-8), 1.31 (d, Ha-15), 1.78 (dd, Hb-15), 4.48 (brt, H-16), 2.42 (d, H-17), 2.75 (ddd, Ha-23), 2.92 (ddd, Hb-23), 1.14 (CH3-18), 1.03 (s, CH3-19), 1.46 (d, CH3-21), 1.52 (s, CH3-26), 1.52 (s, CH3-27), 1.12 (s, CH3-28), 1.27 (s, CH3-29), 1.20 (s, CH3-30), 2.03 (OAc)

β-D-Glcp: 4.53 (d, H-1), 3.99, 3.77 (dd, H2-6) [1]

13 C NMR (75.5 MHz, CD 3OD): [ 1]

Table 1

C-1

28.95

C-16

72.04

Glc-1

102.02

2

77.60

17

60.31

2

75.22

3

77.12

18

19.21

3

78.11

4

42.25

19

28.41

4

71.77

5

141.73

20

81.44

5

77.92...

References

  1. 1.
    H. Stuppner, E.P. Muller, H. Wagner, Phytochemistry 30, 305 (1991)CrossRefGoogle Scholar

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© Springer Science+Business Media New York 2013

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