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