InChI=1S/C16H21NO7/c1-2-7-8-4-3-5-17-10(8)14(24-16(17)21)13(7)23-15-12(20)11(19)9(18)6-22-15/h2,4,9-15,18-20H,3,5-6H2,1H3/b7-2-/t9-,10+,11+,12-,13+,14+,15+/m1/s1