Treatment of pyroyunaconitine 1 with NBS—1% HCI soln.at room temperaturefor 12 h.leads to compound 2 having an α,β—unsaturated ketone system in 15% yield.It
3-Acetyltropolone was reacted with 2-aminobenzaldehydes to afford 3-(2-quinolyl)tropolones.2-Acetyl-7-methylaminotropone and 2-acetyl-7-ethylamino-tropone were
Mass spectral behavior of some deuterated and non-deuterated substituted benzylglyoxals was characteristic in enolic structure which was also proved by NMR spec
From the bulbs of Fritillaria siechuanica S.C.Chen cultivated in Sichuanprovince,a new steroidal alkaloid,siechuansine,was isolated.Spectral methods demonstrate