4H-1-benzopyran-4-one, 7-hydroxy-3-(4-methoxyphenyl)-8-methyl-6-nitro- 7-hydroxy-3-(4-methoxyphenyl)-8-methyl-6-nitro-4H-chromen-4-one InChI=1/C17H13NO6/c1-9-15(19)14(18(21)22)7-12-16(20)13(8-24-17(9)12)10-3-5-11(23-2)6-4-10/h3-8,19H,1-2H