InChI=1S/C24H28O4/c1-3-5-9-17-15-11-12-16-20(19(15)21(25)27-17)24-14-8-7-13-23(16,24)22(26)28-18(24)10-6-4-2/h7,9-10,13,16,20H,3-6,8,11-12,14H2,1-2H3/b17-9-,18-10+