InChI=1S/C22H34O4/c1-2-3-4-5-6-10-15-19(23)16-11-8-7-9-13-18-14-12-17-20(24)21(18)22(25)26/h10,12,14-15,17,19,23-24H,2-9,11,13,16H2,1H3,(H,25,26)/b15-10+