Zj. Pang et O. Sterner, THE ISOLATION OF 2,2'-BIINDOLINE-3,3'-DIONES FROM INJURED FRUIT BODIES OF COLLYBIA-PERONATA AND TRICHOLOMA-SCALPTURATUM, Journal of natural products, 57(6), 1994, pp. 852-857
Several 3-indolinone dimers have been isolated from EtOAc extracts of
the fruit bodies of Collybia peronata {peronatin A [1] and peronatin B
[2]} and Tricholoma scalpturatum {7-hydroxy-7'-methoxyperonatin B [3]
and 7,7'-dimethoxyperonatin B [4]}, and their structures have been de
termined by mass spectrometry and nmr spectroscopy. The compounds are
formed in the fruit bodies as a response to injury, although small amo
unts may be present also in intact specimens. It is suggested that the
y are probably formed by oxidative coupling of the corresponding 3-ind
olinones.