... .2H2O 338.27Chemical Name:4 H- 1-Benzopyran-4-one, 2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy- ,dihydrateEnglish byname: ,3 ... ,5,7-Pentahydroxyflavone hydrate;3,3,4,5,7-pentahydroxy-2-phenyl-4H-chromen-4-one; Quercetin hydrate; Quercetin3,3,4,5 ...