InChI=1S/C18H21NO6/c1-25-17-8-11(2-5-14(17)21)3-7-18(24)19-10-16(23)12-4-6-13(20)15(22)9-12/h2,4-6,8-9,16,20-23H,3,7,10H2,1H3,(H,19,24)