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A structure–activity relationship study of active molecules against chloroquine‐resistant Plasmodium falciparum K1 strain is… Expand ObjectiveTo obtain micro propagated Uncaria tomentosa plantlets with enhanced secondary metabolites production, long-term… Expand The antitumor activity of Uncaria tomentosa, a native vine from the Amazonian rainforest, has been ascribed to pentacyclic… Expand Chemical studies on Hamelia patens (Rubiaceae) micropropagated plantlets allowed production of a new monoterpenoid oxindole… Expand The alkaloids of Uncaria tomentosa micropropagated plantlets and root cultures were isolated and identified by NMR and mass… Expand Oxindole alkaloids, isolated from the bark of Uncaria tomentosa [Willd. ex Schult.] Rubiaceae, are considered to be responsible… Expand The alkaloid and procyanidin composition of Uncaria sp. from eastern Peru, used in folk medicine was studied. Five alkaloids have… Expand The leaves of Mitragyna inermis (Willd.) O. Kuntze have been examined for alkaloids and shown to contain routundifoline… Expand Abstract The TLC behaviour of eighteen closes D ring oxindole alkaloids on alumina and silica gel layers is describe and the… Expand