InChI=1S/C37H32O17/c1-12-5-18(39)26-28(41)22-16(6-13(48-2)9-20(22)50-4)24(33(26)51-12)25-17-7-14(49-3)10-21(53-37-32(45)30(43)31(44)35(54-37)36(46)47)23(17)29(42)27-19(40)8-15(11-38)52-34(25)27/h5-10,30-32,35,37-38,41-45H,11H2,1-4H3,(H,46,47)