- Studies on the Constituents of the Leaves of Pieris japonica D. Don
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Four new diterpenoids, pieristoxins H(I), I(II), J(III) and K(IV), were isolated from the leaves of Pieris japonica D.Don, together with the known diterpenoids, asebotoxin IV(XI) and VII(XII).The chemical structures of I and II were established to be 7-O-hydroxy and 14-O-lactoyl grayanotoxin III, respectively.III and IV were shown to be esters of pieristoxin G(VI), one of the most highly oxygenated grayanoids.Keywords---Pieris japonica; Ericaceae; asebi; diterpenoids; pieristoxin H; pieristoxin I; pieristoxin J; pieristoxin K; grayanoid; toxin
- Katai, Masaaki,Fujiwara, Masayoshi,Terai, Tadamasa,Meguri, Haruo
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p. 3124 - 3126
(2007/10/02)
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