2-((3,4-Dihydroxyphenyl)methylene)-6-(beta-D-glucopyranosyloxy)-4-hydroxy-3(2H)-benzofuranone 3(2H)-Benzofuranone, 2-((3,4-dihydroxyphenyl)methylene)-6-(beta-D-glucopyranosyloxy)-4-hydroxy-, (2Z)- 633-15-8