ESR measurements using spin trapping technique werecarried out for β-carotene-halobenzene system under UV lightirradiation.The ESR spectra observed in the pres
Four new sesquiterpenes were isolated from the roots of Ligularia virgaurea, and identified as furanomexicanane-9-ene-8-one(1), 9β, 10β-epoxyfuranomexicanane-
Five new diterpenes were isolated from Euphorbia sieboldianaand identified as atis-16-en-13(S)-hydroxy-3,14-dione(Ⅰ),atis-16-en-14-oxo-13(S),3 β-diol(Ⅱ),atis
A rare nor-sesquiterpenoid with a γ-spirolactone, pathyiactone A(1), was isolated from the soft coral Paralemnalia thysoides. The structure and absolute stereo
A stereocontrolled construction of the side chain of brassinclide and homobrassinolide has been achieved via the tandem vicinal dialkylation of the pyranone moi
A three—component enzyme system that catalyzes in vivo the oxidation of CH<sub>4</sub> to CH<sub>3</sub>OH has been purified with high specific activity from a