Keeping in view the biological activities of 3-hydroxyisoxa-zole and cyclic phosphate derivatives,some compounds possessing thesetwo moieties have been synthesi
The microphase separation extent of biomedical segmentedpolyetherurethanes were greatly enhanced due to the presence of sulfoalkylpendant groups contained in th
A 6-pyridinium salt(2)was obtalned from 2’,3’,5’-tri-O-acetyhnosine by useof phosphoryl chloride as the condensmg agent.The conversion of salt(2)into 6-(2-me
The structure of a new macrocyclic compound,clemochinenoside B,isolated from the root of Clematis chinensis was elucidated by means ofNMR,FAB-MS,NOE and chemica
The calculations on the ground state and twoexcited states3B2,BIB2 of MgH2 system are carried out by using(Second Order Configuration Interaction)method.For ea
A new Lycopodium alkaloid huperzine A (1) possesses a potent inhibitory activity ofacetylcholinesterase. Six structurally simplified analogues of huperzine A, c