The graphtheory method is used to enumerate the numbers of constitutions,configurations,chiral and achiral configurations of substituted crown ethers.The numeri
Four new taxane diterpenoids were isolated fromthe bark of Taxus yunnanensis.Their structures wereelucidated as the new skeleton with 5/7/6/4 membered ringsby s
The intersection point rule for homologues in gas chromatography was discovered manyyears ago,now more and more application and development are occurring in rec
Degradation reaction of doxycycline or methacycline was carried outin KOH solution and intense fluorescence was obtained.A degradationmechanism of doxycycline o
both theoretical and experimental findings of the photoresponse for waterspliting of the pyrolytically prepared thin film iron oxide electrodes are given.Fur-th