InChI=1S/C21H21ClN2O7/c22-11-6-7-13-12(8-11)15(10-4-2-1-3-5-10)23-9-14(24-13)30-21-18(27)16(25)17(26)19(31-21)20(28)29/h1-8,14,16-19,21,24-27H,9H2,(H,28,29)/t14?,16-,17-,18+,19-,21?/m0/s1