InChI=1S/C21H31O4/c1-12(23)19-18(25)10-17-15-4-3-13-9-14(24)5-7-20(13,2)16(15)6-8-21(17,19)11-22/h3,14-19,22,25H,4-11H2,1-2H3/t14?,15?,16?,17?,18?,19?,20-,21+/m0/s1