(2S,3S)-4-((1e)-3-((1R)-1-carboxy-2-(3,4-dihydroxyphenyl)ethoxy)-3-oxo-1-propen-1-yl)-2-(3,4-dihydroxyphenyl)-2,3-dihydro-7-hydroxy-3-benzofurancarboxylic acid 3-((1R)-1-carboxy-2-(3,4-dihydroxyphenyl)ethyl) ester, dan shen suan B, danfensuan B, lithospermic acid B, monardic acid B, salvianolic acid B