InChI=1S/C22H28O4/c1-6-7-13-25-21(23)18-9-8-10-19(15-18)22(24)26-20(14-17(4)5)12-11-16(2)3/h8-10,15,17,20H,2,6-7,13-14H2,1,3-5H3