InChI=1S/C19H20ClNO7/c1-21-15-7-4-6-12(18(27)19(7,28)11(24)5-10(15)23)17(26)14-9(22)3-2-8(20)13(14)16(6)25/h2-3,6-7,10,12,15-16,21-23,25,28H,4-5H2,1H3/t6?,7?,10?,12?,15?,16?,19-/m1/s1