Secondary Metabolites from Magnolia kachirachirai

Abstract Investigation of the root bark of Magnolia kachirachirai led to the isolation of a new sesquiterpene, kachirachirain (1), and a new aporphine alkaloid, kachirachiranine (2), together with 20 known compounds, of which dimethyl 4,4′‐methylenebis(4,1‐phenylene)diurethane (3) was isolated for the first time from a natural source. Their structures were elucidated by spectroscopic analysis.