InChI=1S/C22H34O4/c23-18-13-11-9-7-5-3-1-2-4-6-8-10-12-15-19-16-14-17-20(24)21(19)22(25)26/h1,3,14,16-17,23-24H,2,4-13,15,18H2,(H,25,26)/b3-1+