InChI=1S/C17H28O7/c1-2-3-4-5-6-7-8-9-10-13(15(20)21)17(24,16(22)23)12-11-14(18)19/h2,13,24H,1,3-12H2,(H,18,19)(H,20,21)(H,22,23)/t13-,17+/m0/s1