InChI=1S/C16H24O7/c1-15(6-3-7-8(4-6)16(7,15)2)5-22-14-11(19)9(17)10(18)12(23-14)13(20)21/h6-12,14,17-19H,3-5H2,1-2H3,(H,20,21)