InChI=1S/C19H17NO5/c1-20-12-5-3-2-4-10(12)18(23)16-13(22)7-14-11(17(16)20)6-15(25-14)19(8-21)9-24-19/h2-5,7,15,21-22H,6,8-9H2,1H3