InChI=1S/C19H21NO4/c1-23-16-4-3-11-5-6-20-10-13-8-15(21)17(24-2)9-12(13)7-14(20)18(11)19(16)22/h3-4,8-9,14,21-22H,5-7,10H2,1-2H3/t14-/m0/s1