InChI=1S/C14H19NO7/c15-6-5-7-1-3-8(4-2-7)21-14-11(18)9(16)10(17)12(22-14)13(19)20/h1-4,9-12,14,16-18H,5-6,15H2,(H,19,20)/t9-,10-,11+,12-,14+/m0/s1