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Phaseollin is an isoflavonoid phytoalexin that can be isolated from Phaseolus vulgaris . Phaseollin is toxic to bean hypocotyl and endocarp cells, and causes a complete lysis of sheep erythrocytes[1].

ChEBI: A prenylated member of the class of pterocarpans and an organic heteropentacyclic compound that is 2,3,6b,12b-tetrahydro-1H,7H-chromeno[6',5':4,5]furo[3,2-c]chromen-10-ol in which both of the hydrogens at position 3 have been replaced by methyl groups (the R,R stereoisomer). It is found in found in the seeds of Phaseolus vulgaris (French bean) and in the stems of Erythrina subumbrans.

[1] Doherty J, Buescher R. Occurrence of the phytoalexin phaseollin in pods of Phaseolus vulgaris. J Sci Food Agric. 1978 Oct;29(10):853-6. DOI:10.1002/jsfa.2740291006