Spencer, K.C.; Seigler, D.S.; Steyn, P.J.J.; Bigalke, R.D.; Cameron, Colin McKenzie; Gilchrist, Frances M.C.; Jordaan, E.; Morren, A.J.; Verster, Anna J.M.; Verwoerd, Daniel Wynand; Walker, Jane B.
(Published by The Government Printer, Pretoria, 1982)
Tetraphyllin B and epi-tetraphyllin B have been isolated from the South African plant Adenia glauca Schinz in an approximate ratio of 5 : 1.
The structures were established by ¹H-NMR.