InChI=1/C21H18O7/c1-12-20(13-3-6-16-18(9-13)26-8-7-25-16)21(23)15-5-4-14(10-17(15)28-12)27-11-19(22)24-2/h3-6,9-10H,7-8,11H2,1-2H3 B466BEFF861F45B5