InChI=1S/C22H28O4/c1-14(2)7-5-8-15(3)9-6-10-20-16(4)11-17-12-18(22(24)25)13-19(23)21(17)26-20/h7,9,12-13,20,23H,4-6,8,10-11H2,1-3H3,(H,24,25)/b15-9-