5,7-Dihydroxy-6-[4-(5-hydroxy-7-methoxy-4-oxo-4H-1-benzopyran-2-yl)phenoxy]-2-(4-hydroxyphenyl)-4H-1-benzopyran-4-oneV94246 · CAS 20931-36-698%¥1980.00 / 1mg 起选规格