Ceanofendl in pentatate: a new aryltetralin from ceanothus Fendleri

ABSTRACT

A new aryltetrahydronaphthalene derivative, 4-[2',4',6'- triacetoxyphenyl]-5,6,7-trimethyl-1 alpha, 2 beta- diacetoxy-4-hydroxy-1,2,3,4-tetrahydronaphthalene, ceanofendlin pentaacetate, was isolated from the acetylated ethyl acetate extract of Ceanothus fendleri, Rhamnaceae. The known flavonoids kaempferol, kaempferol-3-O-beta-D-glucopyranoside-7-O-alpha-L-rhamnopyranoside, kaempferol-3-O-rutinoside, quercetin-3-O-rutinoside [rutin] and quercetin-3-O-alpha-L-rhamnopyranosyl-[1-6]-O-beta-D-galactopyranoside were also obtained. The structural characteristics of these compounds were confirmed by spectroscopic methods: