InChI=1S/C18H21NO5/c1-24-17-10-12(2-8-15(17)21)3-9-18(23)19-11-16(22)13-4-6-14(20)7-5-13/h2,4-8,10,16,20-22H,3,9,11H2,1H3,(H,19,23)