InChI=1S/C21H24O7/c22-16-17(23)19(20(25)26)28-21(18(16)24)27-15-11-9-14(10-12-15)8-4-7-13-5-2-1-3-6-13/h1-3,5-6,9-12,16-19,21-24H,4,7-8H2,(H,25,26)