InChI=1S/C18H21NO6/c20-9-14-15(21)16(22)17(23)18(24-14)8-13(19-25-18)12-6-5-10-3-1-2-4-11(10)7-12/h1-7,13-17,19-23H,8-9H2/t13-,14+,15+,16-,17+,18+/m0/s1