3 hasil
An ethanolic extract of Psorospermum febrifugum was fractionated with antileukemic activity in vivo in the P388 lymphocytic leukemia in mice and in vitro in the KB cell culture system used as a guide. The new antileukemic xanthone psorospermin 1 was isolated, and its structure was elucidated. The
Psorospermum febrifugum was examined using tandem ms for the presence of 3',4'-deoxypsorospermin-4'-chloro-3'-ol and psorospermin. Collision-induced dissociation at both high and low energy is used to bring about fragmentation. Daughter spectra were interpreted to reveal characteristic
Psorospermin, a cytotoxic dihydrofuranoxanthone isolated from Psorospermum febrifugum, produced aberrant simian virus 40 DNA replication intermediates when added to lytically infected CV-1 monkey kidney cells. The aberrant viral intermediates showed dose-dependent DNA strand breaks and protein-DNA