InChI=1S/C21H28O4/c1-4-5-6-7-13-10-17(22)19-15-12-14(20(23)24)8-9-16(15)21(2,3)25-18(19)11-13/h8,10-11,15-16,22H,4-7,9,12H2,1-3H3,(H,23,24)