简介:TheNb-bromomethylderivative(2)ofgelsemine,aquaternaryammoniumsalt,wasfoundtoberecalcitranttowardHofmanntypealkalinedegradationwhichhasbeensuccessfulinothercases.Instead,are-distributionoftheN-methylgrouptookplace,givingriseto3a,1,3band3c,indescendingorderofRfvalues.
简介:MeasurementofConcentrationDistributionof ElectrogeneratedEtchantUsinganElectrochemicalProbeTechniqueMeasurementofConcentratio...