InChI=1S/C20H22FNO4/c21-14-3-1-13(2-4-14)20(25)7-9-22(10-8-20)17-12-26-18-11-15(23)5-6-16(18)19(17)24/h1-6,11,17,19,23-25H,7-10,12H2/t17-,19+/m1/s1