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