InChI=1S/C16H18O11/c17-8-9(18)12(15(24)25)27-16(10(8)19)26-11(6-4-2-1-3-5-6)7(13(20)21)14(22)23/h1-5,7-12,16-19H,(H,20,21)(H,22,23)(H,24,25)