An aporphinoid alkaloid from Pseuduvaria macrophylla

Caldensin, A New Natural N-Methylaristolactam from Piper caldense

“…In continuation of this work, we isolated a new N-methylaristolactam from Piper caldense. This is the second report of a naturally occurring Nmethylaristolactam althought such compounds have been synthesized (Castedo et al, 1976), and N-methyl derivatives of 4,5-dioxoaporphines, the proposed biosynthetic precursors of aristolactams, have been reported (Desai et al, 1988;Mahmood et al, 1986;Hänsel et al, 1976;Singh et al, 1996;Achenbach et al, 1991). …”

Chemical Compositions of Essential Oils of Selected Medicinal Plants from Thùa Thiên-Huế Province, Vietnam

“…Phytochemical investigations revealed the characterization of alkaloids from Pseuduvaria species (12,16,29) as well as diterpenes from P. indochinensis (22,30); alkaloids (11,25), and lactones (2) from M. virgata and other species; alkaloids from Orophea species (14,23,26); sesquiterpenes and flavonoids (9,19) from Friesodielsia species; diterpenes and triterpens (20,21) and alkaloids (16,28) from Polyalthia species. The essential oils of some Polyalthia (5) and Pseuduvaria (4) have been reported in the literature.…”

Solid-phase synthesis of isoindolinones and naturally-occurring benzobutyrolactones (phthalides) using a cyclative-cleavage approach

“…24 In this case, isoindolinones (phthalimidines) should be specifically mentioned. 25 taliscanine, 26 which occurs in the rhizomes of Aristolochia taliscanina, enterocarpam II, 27 isolated from the stem bark of Orophea enterocarpa (Annoniacae), or velutinam 28 from extracts of leaves and twigs of Goniothalamus velutinus belong to the aristolactams. Aristolactams are a minor group of aporphinoid alkaloids biogenetically derived from isoquinolines.…”