InChI=1S/C21H28O4/c1-20-9-7-13(22)11-12(20)3-4-14-15-5-6-17(18(23)19(24)25)21(15,2)10-8-16(14)20/h11,14-17H,3-10H2,1-2H3,(H,24,25)/t14?,15?,16?,17?,20-,21-/m0/s1