Erythrina subumbrans, common names tton tong or dadap, is a flowering plant species in the genus Erythrina.
The pterocarpans phaseolin, erybraedins A and B are found in the stems of E. subumbrans.Antibacterial Pterocarpans from Erythrina subumbrans. Thitima Rukachaisirikul, Phongsak Innok, Nuntana Aroonrerk, Woraluk Boonamnuaylap, Saranya Limrangsun, Chanakan Boonyon, Umpawan Woonjina and Apichart Suksamrarn, Journal of Ethnopharmacology, Volume 110, Issue 1, 1 March 2007, Pages 171-175,
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