22007-72-3 4H-1-Benzopyran-4-one, 7-((6-deoxy-alpha-L-mannopyranosyl)oxy)-2-(3,4-dihydroxyphenyl)-3,5-dihydroxy- 7-((6-Deoxy-alpha-L-mannopyranosyl)oxy)-2-(3,4-dihydroxyphenyl)-3,5-dihydroxy-4H-benzopyran-4-one