Synonyms: Benzenepropanoicacid, 3,4-dihydroxy-a-[[(2E)-1-oxo-3-(4,7,8-trihydroxydibenz[b,f]oxepin-1-yl)-2-propenyl]oxy]-,(aR)- (9CI); Benzenepropanoic acid,3,4-dihydroxy-a-[[1-oxo-3-(4,7,8-trihydroxydibenz[b,f]oxepin-1-yl)-2-propenyl]oxy]-,[R-(E)]-; Dibenz[b,f]oxepin, benzenepropanoic acid deriv.; Isosalvianolic acidC