Isoflaccidinin and isooxoflaccidin, stilbenoids from Coelogyne flaccida
作者:P.L. Majumder、D.C. Maiti
DOI:10.1016/0031-9422(91)85289-c
日期:1991.1
Abstract Isoflaccidinin and isooxoflaccidin, new phenanthropyrone derivatives, isolated from the orchid Coelogyne flaccida were shown to be 2,7-dihydroxy-6-methoxy-5H-phenanthro [4,5- bcd ] pyran-5-one and 2,7-dihydroxy-6-methoxy-9,10-dihydro-5 H -phenanthro [4,5- bcd ] pyron-5-one, respectively, from spectral and chemical evidence.
Flaccidinin and oxoflaccidin, two phenanthrene derivatives of the orchid coelogyne flaccida
作者:P.L. Majumder*、D.C. Maiti
DOI:10.1016/0031-9422(89)80137-2
日期:1989.1
Abstract Flaccidinin, a new phenanthropyrone derivative, and oxoflaccidin, the corresponding 9,10-dihydro compound, were isolated from the orchid Coelogyne flaccida which also yielded the previously reported 9,10-dihydrophenanthropyran derivatives flaccidin and imbricatin. The structures of flaccidinin and oxoflaccidin were established from spectral evidence and by chemical correlation.