InChI=1S/C21H28O5/c1-20-8-7-16-14(15(20)4-5-17(20)18(24)11-22)3-2-12-10-13(23)6-9-21(12,16)19(25)26/h10,14-17,22H,2-9,11H2,1H3,(H,25,26)/t14?,15?,16?,17-,20+,21-/m1/s1