2-Ethylrutoside 36057-92-8 4H-1-Benzopyran-4-one, 3-((6-O-(6-deoxy-alpha-L-mannopyranosyl)-beta-D-glucopyranosyl)oxy)-2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-, monoethyl ether ortho-Ethylrutoside