InChI=1/C20H21NO7S/c1-11-8-16(14(4)13(3)12(11)2)18(22)10-28-20(23)15-6-7-19(29(5,26)27)17(9-15)21(24)25/h6-9H,10H2,1-5H3 0D7DE9F3A55BB2CD