Synthesis of the dibenzyl ester of tert-butoxycarbonyl-L-alanyl-D-glutamic acid from racemic glutamic acid
AE Zemlyakov, DA Poteev, VY Chirva
文献索引：Zemlyakov, A. E.; Poteev, D. A.; Chirva, V. Ya. Chemistry of Natural Compounds, 1991 , vol. 27, # 6 p. 764 - 765 Khimiya Prirodnykh Soedinenii, 1991 , # 6 p. 865 - 866
The amount of lappaconitine in the total alkaloids was determined by a gravimetric method at the stage of treating the total ether-soluble alkaloids with methanol and on column chromatography of the mother solution on alumina [diethyl ether-hexane (i:i)]. Lappaconitine made up about
