InChI=1S/C21H22NO7S/c1-22(18(23)12-29-30(24,25)26)9-8-14-11-17(27-2)21(28-3)20-15-7-5-4-6-13(15)10-16(22)19(14)20/h4-7,10-11H,8-9,12H2,1-3H3,(H,24,25,26)