ROBUSTAMINE ds-N-OXIDE AND MERENDERINE FROM Merendera robusta

摘要

We have previously [1] given some results of an investigation of the total alkaloids of Merendera robusta Bge. growing in Kyzyl-Kum (Bukharskaya oblast). We detected the presence in the plant of, together with known tropolone alkaloids and their photochemical isomers, a series of compounds not containing the tropolone ring, two of which were isolated in the crystalline form. The structure of one of them — robustarnine — was established.