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