InChI=1/C17H18N2O4/c18-15(10-16(20)21)17(22)19-13-6-8-14(9-7-13)23-11-12-4-2-1-3-5-12/h1-9,15H,10-11,18H2,(H,19,22)(H,20,21)/t15-/m0/s1/f/h18-19H 3F780C4B63EFB72A