InChI=1S/C18H30O5/c1-2-13(19)10-11-15-14(16-12-17(15)23-22-16)8-6-4-3-5-7-9-18(20)21/h10-11,13-17,19H,2-9,12H2,1H3,(H,20,21)/b11-10+