InChI=1S/C16H24O7/c1-7-3-4-16(5-9(7)16)8(2)6-22-15-12(19)10(17)11(18)13(23-15)14(20)21/h8-13,15,17-19H,1,3-6H2,2H3,(H,20,21)/t8?,9?,10?,11?,12?,13?,15?,16-/m0/s1