InChI=1S/C21H28O6/c1-20-7-6-12(23)8-11(20)2-3-13-14-4-5-15(17(25)10-22)21(14,19(26)27)9-16(24)18(13)20/h8,13-16,18,22,24H,2-7,9-10H2,1H3,(H,26,27)/t13?,14?,15?,16?,18?,20-,21+/m0/s1