A LUPANE DERIVATIVE AND THE 13C NMR CHEMICAL SHIFTS OF SOME LUPANOLS FROM PLEUROSTYLIA OPPOSITA

Article abstract of DOI:10.1016/0031-9422(82)83044-6

A new lupane derivative isolated from Pleurostylia opposita has been assigned the structure 6β-hydroxy-lup-20(29)-en-3-one, using spectral evidence and chemical interconversions.The 13C NMR spectral assignments of 20-hydroxy-lupan-3-one, 6β,20-dihydroxy-lupan-3-one, 6β,28-dihydroxy-lup-20(29)-en-3-one and 20-hydroxy-lupane-3,6-dione previously isolated from the same plant are also reported.Key Word Index - Pleurostylis opposita; Celastraceae; triterpenes; new lupane derivatives; 13C NMR chemical shifts.