PRENYLATED XANTHONES FROM Rheedia acuminata (reprinted from Acta Amazônica, 23(2/3):181-185)

ABSTRACT

Pyranojacareubin; 1,5-dihydroxy-6',6'-dimethyl-2H-pyran(2,,3'6,7) -6",6"-dime-thyl-2H,4H-pyran(2",3"2,3)xanthone and a new xanthone l,6-dihydroxy-5-methoxy-6',6'-dime-thyl-2H-pyran(2',3'3,2)-7-(3,3-dimethylprop-2-enyl)xanthone were isolated from the ether extract of the root bark of Rheedia acuminata together with friedelin and friedelanol.

RESUMO

Piranojacareubina; 1,5-diidroxi-6',6'-dimetil-2H-pirano(2',3'6,7)-6",6"-dimetil-2H,4H(2",3"2,3)xantona e uma xantona inédita 1,6-diidroxi-5-metoxi-6,6'-dimetil-2H-pirano(2',3'3,2)-7-(3,3-dimetilprop-2-enil) xantona foram isoladas do extrato etèreo da casca da raiz de Rheedia acuminata além de friedelina e friedelanol.