InChI=1S/C21H22NO7S/c1-12(23)22(2)11-18(29-30(24,25)26)15-10-17(27-3)21(28-4)20-14-8-6-5-7-13(14)9-16(22)19(15)20/h5-10,18H,11H2,1-4H3,(H,24,25,26)