Lignans and neolignans from stems and fruits of Piper wightii

✍ Scribed by Ashok K. Prasad; Om D. Tyagi; Jesper Wengel; Per M. Boll; Carl E. Olsen; Nawal K. Sharma; Kirpal S. Bisht; Suman Gupta; Virinder S. Parmar

• Publisher: Elsevier Science
• Year: 1994
• Tongue: French
• Weight: 724 KB
• Volume: 50
• Category: Article
• ISSN: 0040-4020
• DOI: 10.1016/s0040-4020(01)85081-x

✦ Synopsis

2. were isolated from the peholeum ether extract of Stems of Piper wighrii Miq. Tlte structures were elucidated on the bask of their spectmscopic analysis and chemical transformation. Additionally five known neolignans, isodihydmf~to@nol A (3) and B (4). lancifolin C (5) and D (6) and wallichinine (7) and two known a,a'-diaryl-~,~'-dim~yl~y~~f~ lignans, calopiptin (8) and machiKn G (9). were isolated for the first time fmm Piper wightii. The new neolignan 2, isodihydrofutoquinol B (4). lancifolin C (5) and wallichinine (7) were also isolated from the methanol extract of fruits of the same species alongwith gelbelgin (lo), also a known lignan of the tetmhydmbenxofumn type.