Two isopentenyl resorcinols from Peperomia tetraphylla.

Two isopentenyl resorcinols, peperobtusin B and peperobtusin C, have been isolated from Peperomia tetraphylla. Their structures were determined on the basis of spectroscopic methods, especially ¹H NMR, ¹³C NMR, 2D NMR, and HR-TOF-MS. Two compounds were evaluated for cytostatic activity against G₂, A 549, Hela and HCT 116 cells, but cytostatic activity of both compounds is weak. [ABSTRACT FROM AUTHOR]