InChI=1S/C28H40O4/c1-17(2)18(3)7-8-19(4)21-11-14-28(32-31)23-16-25(30)24-15-20(29)9-12-26(24,5)22(23)10-13-27(21,28)6/h7-8,15-19,21-22,31H,9-14H2,1-6H3/b8-7+/t18-,19+,21+,22-,26+,27+,28+/m0/s1