isoflavonoid coumestans 0 211.98983 212.159 C15O2R10 *c1c(*)c(*)c2c(c1*)OC(*)(*)c1c-2oc2c(*)c(*)c(*)c(*)c12 pterocarpenes CHEBI:72577 chebi_ontology Members of the class of benzofurochromene with a 6<em>H</em>-[1]benzofuro[3,2-<em>c</em>]chromene skeleton and its substituted derivatives. They are the 3,4-didehydroderivatives of pterocarpans.