InChI=1S/C21H32O4/c1-14-12-18(22)21(3)16(19(23)24-4)6-5-7-17(21)20(14,2)10-8-15-9-11-25-13-15/h6,9,14,17-18,22H,5,7-8,10-13H2,1-4H3/t14-,17-,18+,20+,21+/m1/s1