142542-76-5

1-Butanone,1-[3-[[2-(3,4-dihydroxyphenyl)-3,4-dihydro-3,5,7-trihydroxy-2H-1-benzopyran-8-yl]methyl]-2,4-dihydroxy-6-methoxy-5-methylphenyl]-2-methyl-,[2R-(2a,3b)]-