A convergent strategy to the key allylic silyl ether precursor 4 in our synthetic efforts toward morphinan alkaloid is presented. The vital step is the selectiv
A new nitro tetrahydronprotoberberins alkaloid, 1-nitro-apocavidine was isolated from Corydalis saxicola Bunting. The structure was established by spectroscopic
Single and binary adsorption behaviors of salicylic acid and 5-sulfosalicylic acid onto hypercrosslinked polymeric adsorbents,i.e.NDA-101 and NDA-99 were invest