ISOFLAVIDININ AND ISO-OXOFLAVIDININ, TWO 9,10-DIHYDROPHENANTHRENES FROM THE ORCHIDS PHOLIDOTA ARTICULATA, OTOCHILUS PORECTA AND OTOCHILUS FUSCA

Article abstract of DOI:10.1016/0031-9422(82)83104-X

The structures of isoflavidinin and iso-oxoflavidinin, two new modified 9,10-dihydrophenanthrenes of the orchids Pholidota articulata, Otochilus porecta and O. fusca have been established. 13C NMR spectral analysis of isoflavidinin acetate was made to confirm its structure. - Key Word Index: Pholidota articulata; Otochilus porecta; O.fusca; Orchidaceae; isoflavidinin; iso-oxoflavidinin; modified 9,10-dihydrophenanthrenes.