Ce. Olsen et al., AN ARISTOLACTAM FROM PIPER-ACUTISLEGINUM AND REVISION OF THE STRUCTURES OF PIPEROLACTAM-B AND PIPEROLACTAM-D, Phytochemistry, 33(2), 1993, pp. 518-520
A new aristolactam, o-4-hydroxy-2,3-dimethoxyphenanthrene-1-carboxylic
acid lactam, was isolated from the stem of Piper acutisleginum. The s
tructures of two related alkaloids, piperolactam B and D, have been re
vised.