An external preparation for the skin comprising at least one of the glycosides or hydroxysaliyclic acid and/or the glycosides of aliphatic esters of hydroxysalicylic acid represented by the following formula 1: STR1 wherein R1 represents one selected from the group consisting of saturated hydrocarbon group and an unsaturated hydrocarbon group which have 1 to 20 carbon atoms and which may be either a straight-chain or a branched chain, and one of R2 and R3 represents a sugar residue and the other hydrogen. The external preparation for the skin has an excellent whitening effect and/or an excellent skin care effect.
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(2008/06/13)
PHENOLIC GLUCOSIDES FROM THE HEARTWOOD OF PRUNUS GRAYANA
Two new phenolic glucosides, pruyanaside A and pruyanaside B, have been isolated from the heartwood of Prunus grayana.Their structures have been shown by the spectral evidence to be 2'-β-D-glucopyranosyloxybenzyl 2-(6-O-benzoyl-β-D-glucopyranosyloxy)benzoate and 2'-(6-O-benzoyl-β-D-glucopyranosyloxy)benzyl 2-β-D-glucopyranosyloxy-6-hydroxdybenzoate. Key Word Index- Prunus grayana; Rosaceace; phenolic glucosides; salicin; populine; pruyanaside A; pruyanaside B; dehydrodicatechin A.