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Ptycholobium is a genus related to Tephrosia which comprises only three species. Compared to Tephrosia, which has been phytochemically and pharmacologically studied, Ptycholobium species have only few or no reports on their chemical constituents. | Two new pterocarpans and a new pyrone derivative with cytotoxic activities from Ptycholobium contortum N.E.Br. Brummitt Leguminosae Revised NMR assignment of mundulea lactone