Abstract
The exudate produced by glandular trichomes on leaves and stems of Orphium frutescens (Gesneriaceae) has been analyzed. Oleanolic acid and 2α-hydroxy oleanolic acid account for the major portion of this material. At least five xanthones are also present, three of which were identified as the known tetrasubstituted compounds decussatin, swertianin, and nor-swertianin.
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