InChI=1S/C21H30O4/c1-5-6-7-8-13-11-15(22)18-16(12-13)25-20(2,3)14-9-10-21(4,24)19(23)17(14)18/h11-12,19,22-24H,5-10H2,1-4H3/t19-,21-/m0/s1