Triterpenoids of the Bark of Pieris japonica D. DON

Triterpenoids of the Bark of Pieris japonica D. DON

Triterpenoids in the bark of Pieris japonica D. DON were investigated. Oleanolic acid acetate, ursolic acid acetate, ursolic acid, β-sitosterol, lupeol and compound A (VI), mp 262-263°, C32H50O5, were obtained. The physical properties of VI were elucidated by infrared absorption, nuclear magnetic re...

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Veröffentlicht in:Chemical & pharmaceutical bulletin 1981/01/25, Vol.29(1), pp.261-264
Hauptverfasser: KATAI, MASAAKI, TERAI, TADAMASA, MEGURI, HARUO
Format: Artikel
Sprache:eng
Schlagworte:
3β-acetoxy-16α-hydroxy-ursan-28, 19-olide
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Zusammenfassung:Triterpenoids in the bark of Pieris japonica D. DON were investigated. Oleanolic acid acetate, ursolic acid acetate, ursolic acid, β-sitosterol, lupeol and compound A (VI), mp 262-263°, C32H50O5, were obtained. The physical properties of VI were elucidated by infrared absorption, nuclear magnetic resonance (NMR), 13C-NMR and mass spectral studies. The structure of VI is probably 3β-acetoxy-16α-hydroxy-ursan-28, 19-olide.
ISSN:0009-2363
1347-5223
DOI:10.1248/cpb.29.261