InChI=1S/C21H28O7/c1-10-6-13-11(18(25)26-10)7-14-20(4,27-13)9-12(22)17-19(2,3)28-16(24)8-15(23)21(14,17)5/h6,12,14-15,17,22-23H,7-9H2,1-5H3/t12-,14+,15+,17+,20-,21+/m1/s1