InChI=1S/C24H38O4/c1-15(3-8-22(27)28)19-6-7-20-18-5-4-16-13-17(26)9-12-24(16,14-25)21(18)10-11-23(19,20)2/h15-16,18-21,25H,3-14H2,1-2H3,(H,27,28)/t15?,16?,18?,19?,20?,21?,23-,24-/m1/s1