InChI=1S/C20H21ClO7/c21-15-6-3-13(8-12(15)7-11-1-4-14(23)5-2-11)20-18(26)16(24)17(25)19(9-22,28-20)10-27-20/h1-6,8,16-18,22-26H,7,9-10H2/t16-,17-,18+,19-,20-/m0/s1