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