A new dihydroflavone and a new polyacetylene glucoside from .

A new dihydroflavone, 2()-isookanin-4'-methoxy-8----glucopyranoside (), and a new polyacetylene glucoside, (10)-tridecane-2-ene-4,6,8-triyne-1-ol-10----glucopyranoside (), along with seven known compounds (), were isolated from the herb of Willd. The structures of all the extracted compounds were elucidated by HR-ESI-MS, 1 D and 2 D NMR spectra, as well as circular dichroism (CD).

[Chemical Constituents of Paulownia tomentosa Fruits].

Objective: To investigate the chemical constituents from the fruits of Paulownia tomentosa.

Methods: The compounds were isolated and purified by column chromatography and their structures were identified on the basis of physicochemical properties and spectral analyses.

Results: Seven compounds were isolated and their structures were identified as ursolic acid (1), sesamin(2),2α,3α, 19a-trihydroxyurs-12-en-28-oic acid(3), luteolin(4), tricin-7-O-β-D-glucoside(5),3',4',5,7-tetrahydroxy-6-[7-hydroxy-3,7-dimethyl-2(E)-octenyl] flavanone(6) and stigmasterol(7).