The Michael addition of α-chloroesters to α,β-unsaturated systems was catalyzed bytraalkylammonium salt in a two-phase solid-liquid system, and some polysubs
Two new water-soluble binuclear copper(II)chelates derived from the condensationof 2,6-diformyl-4-methylphenol with glycylglycine were characterized with spectr
Two C<sub>21</sub>-steroids,named amalogenin A amd amaloside A were isola-ted from the rhizome of Amalocalyx yunnanesis.Their structures were estab-lished by an