InChI=1S/C22H32O4/c1-2-13-19(23)16-11-9-7-5-3-4-6-8-10-14-18-15-12-17-20(24)21(18)22(25)26/h7,9,11-12,15-17,19,23-24H,2-6,8,10,13-14H2,1H3,(H,25,26)/b9-7-,16-11+