The absolute stereochemistry of protoxylogranatin A - a new protolimonoid from the seeds of Chinese mangrove Xylocarpus granatum
Titel:
The absolute stereochemistry of protoxylogranatin A - a new protolimonoid from the seeds of Chinese mangrove Xylocarpus granatum
Auteur:
Li, Min-Yi Wu, Jun Zhang, Si Xiao, Qiang Li, Qing-Xin
Verschenen in:
Journal of Asian natural products research
Paginering:
Jaargang 10 (2008) nr. 6 pagina's 503-508
Jaar:
2008-06
Inhoud:
A new protolimonoid, named protoxylogranatin A, has been isolated from the seeds of a Chinese mangrove Xylocarpus granatum. Its structure was elucidated on the basis of modern spectroscopic data. The absolute configuration was determined by the application of the modified Mosher MTPA ester method. The first complete assignments of 1H and 13C NMR spectral data for this protolimonoid were achieved by means of 2D NMR techniques, including 1H-1H COSY, HSQC, HMBC and NOESY spectra.